Attention amount calculation device, attention amount calculation system and computer program

Abstract

To provide a technology capable of calculating a physical specificity attention amount regarding at least either a left food part or a right foot part of a subject.SOLUTION: An attention amount calculation device includes: a light source control part configured to light a left light source part and a right light source part; a detection part configured to be capable of detecting that a pressing part is pressed by the subject; and a calculation part configured to calculate a physical specificity attention amount on the basis of a reaction time. The left light source part may be disposed at a position overlapping the subject's left foot part in a left knee extension state. The right light source part may be disposed at a position overlapping the subject's right foot part in a right knee extension state. The calculation part is configured at least to calculate a physical specificity attention amount with respect to the subject's left foot part on the basis of expression (1) or to calculate a physical specificity attention amount of the subject's right foot part on the basis of expression (2): Ta(LL)-Ta(EL) (1), Ta(RR)-Ta(ER) (2).SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a technique for calculating body-specific attention amounts. [Background technology]

[0002] For example, Non-Patent Document 1 describes that reactions to visual stimuli on one's own body are faster than reactions to visual stimuli at a position distant from one's own body. According to Non-Patent Document 1, this suggests that attention is subconsciously directed to one's own body. [Prior art documents] [Non-patent literature]

[0003] [Non-Patent Document 1] Naoki Aizu et al., “Body-Specific Attention to the Hands and Feet in Healthy Adults”, Frontiers in Systems Neuroscience, (Rui), January 2022, Volume 15, Article 805746, p.1-10 Summary of the Invention [Problem to be solved by the invention]

[0004] The degree of implicit attention paid to a subject's own body is considered to be useful in understanding motor control by the subject's brain. Hereinafter, the degree of implicit attention paid to a subject's own body is referred to as the amount of body-specific attention. The present inventors have focused particularly on the amount of body-specific attention paid to the subject's feet.

[0005] One aspect of the present disclosure preferably provides a technology capable of calculating a body-specific attention amount for at least one of a subject's left foot and right foot. [Means for solving the problem]

[0006] One aspect of the present disclosure is an attention amount calculation device configured to calculate a body-specific attention amount indicating a degree of potential attention of a subject to his or her own body. The attention amount calculation device includes a light source control unit, a detection unit, and a calculation unit. The light source control unit is configured to turn on a left light source unit and a right light source unit. The detection unit is configured to detect that the subject has pressed the pressing unit. The calculation unit is configured to calculate the body-specific attention amount based on a reaction time. The reaction time is the time elapsed from the time the light source control unit turns on the left light source unit or the right light source unit to the time the detection unit detects that the pressing unit has been pressed. The left light source unit is positioned so as to be visible to a seated subject, overlapping the subject's left foot when the left knee is extended, but not overlapping the subject's left foot when both knees are bent. The right light source unit is positioned so as to be visible to a seated subject, overlapping the subject's right foot when the right knee is extended, but not overlapping the subject's right foot when both knees are bent. The left knee extension state is a state in which a seated subject extends the left knee and bends the right knee. The right knee extension state is a state in which a seated subject bends the left knee and extends the right knee. The both knees bent state is a state in which a seated subject bends both knees. The calculation unit is configured to perform at least one of calculating the body-specific attention amount for the subject's left foot based on the following formula (1) and calculating the body-specific attention amount for the subject's right foot based on the following formula (2).

[0007] Ta(LL)-Ta(EL) (1) Ta(RR)-Ta(ER) (2) (where Ta(LL) is the reaction time when the light source control unit turns on the left light source unit when the left knee is extended. Ta(RR) is the reaction time when the light source control unit turns on the right light source unit when the right knee is extended. Ta(EL) is the reaction time when the light source control unit turns on the left light source unit when both knees are bent. Ta(ER) is the reaction time when the light source control unit turns on the right light source unit when both knees are bent.)

[0008] With this configuration, it is possible to calculate the body-specific attention amount for at least one of the left foot and the right foot of the subject.

[0009] In one aspect of the present disclosure, the calculation unit may be configured to perform at least one of calculating a body-specific attention amount for the subject's left foot based on the following equation (3), and calculating a body-specific attention amount for the subject's right foot based on the following equation (4).

[0010] {Ta(LR)-Ta(LL)}-{Ta(ER)-Ta(EL)} ···(3) {Ta(RL)-Ta(RR)}-{Ta(EL)-Ta(ER)} ···(4) (where Ta(LL) is the reaction time when the light source control unit turns on the left light source unit when the left knee is extended. Ta(LR) is the reaction time when the light source control unit turns on the right light source unit when the left knee is extended. Ta(RL) is the reaction time when the light source control unit turns on the left light source unit when the right knee is extended. Ta(RR) is the reaction time when the light source control unit turns on the right light source unit when the right knee is extended. Ta(EL) is the reaction time when the light source control unit turns on the left light source unit when both knees are flexed. Ta(ER) is the reaction time when the light source control unit turns on the right light source unit when both knees are flexed.)

[0011] With this configuration, the body-specific attention amount for at least one of the left foot and the right foot of the subject can be calculated with even higher accuracy.

[0012] In one aspect of the present disclosure, the light source control unit may be configured to selectively light the left light source unit in a first left lighting color and light the left light source unit in a second left lighting color. The light source control unit may be configured to selectively light the right light source unit in a first right lighting color and light the right light source unit in a second right lighting color. The response time may be the time elapsed from the time the light source control unit lights the left light source unit in the first left lighting color or the time the light source control unit lights the right light source unit in the first right lighting color to the time the detection unit detects that the pressing unit has been pressed.

[0013] With this configuration, the body-specific attention amount for at least one of the left foot and the right foot of the subject can be calculated with even higher accuracy.

[0014] In one aspect of the present disclosure, the ratio of the number of times the light source control unit turns on the left light source unit in the second left lighting color to the number of times the light source control unit turns on the left light source unit in the first left lighting color within a predetermined period may be 10% or more and 30% or less. Also, the ratio of the number of times the light source control unit turns on the right light source unit in the second right lighting color to the number of times the light source control unit turns on the right light source unit in the first right lighting color within a predetermined period may be 10% or more and 30% or less.

[0015] With this configuration, the body-specific attention amount for at least one of the left foot and the right foot of the subject can be calculated with even higher accuracy.

[0016] One aspect of the present disclosure is an attention amount calculation system including the above-described attention amount calculation device, a left light source unit, a right light source unit, and a pressing unit. The left light source unit and the right light source unit are configured to be lit. The pressing unit is configured to be pressable by a subject.

[0017] With this configuration, it is possible to calculate the body-specific attention amount for at least one of the left foot and the right foot of the subject.

[0018] One aspect of the present disclosure is a computer program for causing a computer to function as an attention amount calculation device configured to calculate a body-specific attention amount indicating a degree of potential attention a subject pays to his or her own body. The computer program includes turning on a left light source unit and a right light source unit, detecting that the subject has pressed a pressing unit, and calculating the body-specific attention amount based on a reaction time. The reaction time is the time elapsed from the time the left light source unit or the right light source unit is turned on to the time that pressing of the pressing unit is detected. The left light source unit is positioned so as to be visible to a seated subject, overlapping the subject's left foot in a left knee extended state, but not overlapping the subject's left foot in a both knee flexed state. The right light source unit is positioned so as to be visible to a seated subject, overlapping the subject's right foot in a right knee extended state, but not overlapping the subject's right foot in a both knee flexed state. The left knee extended state is a state in which a seated subject extends his or her left knee and flexes his or her right knee. The right knee extension state is a state in which a seated subject bends the left knee and extends the right knee. The both knees flex state is a state in which a seated subject bends both knees. The computer program at least performs one of the following: calculating the body-specific attention amount for the subject's left foot based on the following formula (1); and calculating the body-specific attention amount for the subject's right foot based on the following formula (2).

[0019] Ta(LL)-Ta(EL) (1) Ta(RR)-Ta(ER) (2) (where Ta(LL) is the reaction time when the left light source is turned on with the left knee extended. Ta(RR) is the reaction time when the right light source is turned on with the right knee extended. Ta(EL) is the reaction time when the left light source is turned on with both knees bent. Ta(ER) is the reaction time when the right light source is turned on with both knees bent.)

[0020] With this configuration, it is possible to calculate the body-specific attention amount for at least one of the left foot and the right foot of the subject. [Brief explanation of the drawings]

[0021] [Figure 1] FIG. 1 is a schematic diagram of an attention amount calculation system. [Figure 2] Fig. 2A is a schematic top view showing a state in which the left knee is extended, Fig. 2B is a schematic top view showing a state in which the right knee is extended, and Fig. 2C is a schematic top view showing a state in which both knees are flexed. [Figure 3] FIG. 1 is a block diagram of an attention amount calculation device. [Figure 4] FIG. 10 is a sequence diagram showing processing executed in the attention amount calculation system. [Figure 5] 4 is a timing chart showing the lighting state of each light source unit. [Figure 6] 10 is a flowchart showing an attention amount calculation process. [Figure 7] 7 is a flowchart continuing from FIG. 6. [Figure 8] FIG. 10 is a diagram illustrating an example of a storage destination table. DETAILED DESCRIPTION OF THE INVENTION

[0022] Hereinafter, exemplary embodiments of the present disclosure will be described with reference to the drawings.

[0023] [1. Configuration] The attention amount calculation system 1 shown in FIG. 1 is a system for calculating the body-specific attention amount of a subject M. The body-specific attention amount is the degree of potential attention that the subject M pays to his or her own body. The subject M may be, for example, a patient with a disease that may affect the body-specific attention amount. A specific example of such a disease is diabetes. Some diabetic patients tend to injure their left or right foot more often in their daily lives than healthy people. It is possible that the body-specific attention amount for diabetic patients to the left or right foot may differ from that of healthy people.

[0024] The attention amount calculation system 1 includes a chair 2, a left footrest 3A, a right footrest 3B, a shielding plate 4, a left light source unit 5A, a right light source unit 5B, a central light source unit 5C, a pressing unit 6, and an attention amount calculation device 7.

[0025] The chair 2 is configured so that the subject M can sit on it. The chair 2 has a seat portion 21 and a backrest portion 22.

[0026] The seat 21 is a portion configured to support the buttocks of the subject M. The seat 21 has a seat surface 211. The seat surface 211 is a surface configured to come into contact with the buttocks of the subject M. The height of the seat surface 211 from the floor Y is the height at which the left foot LF and right foot RF of the subject M come into contact with the floor Y when both knees are bent. The both knees bent state is a state in which the subject M, seated on the chair 2, bends both knees, as shown in FIG. 2C. More specifically, the state in which the left knee or the right knee is bent refers to a state in which the left knee or the right knee is bent approximately 90°. The same applies below. As shown in FIG. 1, the left foot LF of the subject M is the portion of the left leg of the subject M from the ankle to the toes. The right foot RF of the subject M is the portion of the right leg of the subject M from the ankle to the toes.

[0027] The backrest portion 22 is a portion configured to support the back of the subject M. The backrest portion 22 has a back surface 222. The back surface 222 is a surface configured to come into contact with the back of the subject M. The angle formed between the seat surface 211 and the back surface 222 is, for example, 95° or more and 120° or less.

[0028] As shown in FIG. 2A, the left footrest 3A is configured to support at least one of the left lower leg LS and left foot LF of the subject M when the left knee is extended. The left knee extended state is a state in which the subject M, seated in the chair 2, has his / her left knee extended and his / her right knee bent. The left lower leg LS of the subject M is the part of the left leg of the subject M between the knee and the ankle. As shown in FIG. 1, the left footrest 3A has a left support surface 31. The left support surface 31 is a surface configured to come into contact with at least one of the left lower leg LS and left foot LF of the subject M. The height of the left support surface 31 from the floor Y is lower than the height of the seat surface 211 from the floor Y.

[0029] 1 to 2C, the left footrest 3A is configured to support the left foot LF of the subject M when the left knee is extended. For example, when the left knee is extended, the subject M places the left foot LF on the left footrest 3A so that the heel of the left foot LF comes into contact with the left support surface 31. As a result, as shown in FIG. 2A, the left footrest 3A is in a state where it supports the left foot LF of the subject M.

[0030] As shown in FIGS. 1 and 2B, the right footrest 3B is configured to support at least one of the right lower leg RS and right foot RF of the subject M when the right knee is extended. The right knee extension state refers to a state in which the subject M, seated in the chair 2, bends the left knee and extends the right knee. The right lower leg RS of the subject M is the portion of the right leg between the knee and the ankle. As shown in FIG. 1, the right footrest 3B has a right support surface 32. The right support surface 32 is configured to come into contact with at least one of the right lower leg RS and right foot RF of the subject M. For convenience of illustration, the right footrest 3B is shown in FIG. 1 as being slightly smaller than the left footrest 3A. However, in reality, the height of the right support surface 32 from the floor Y is the same as the height of the left support surface 31 from the floor Y. The height of the right support surface 32 from the floor Y is lower than the height of the seat 211 from the floor Y.

[0031] 1 to 2C, the right footrest 3B is configured to support the right foot RF of the subject M when the right knee is extended. For example, when the subject M is in the right knee extended state, the subject M places the right foot RF on the right footrest 3B so that the heel of the right foot RF contacts the right support surface 32. This results in the right footrest 3B supporting the right foot LF of the subject M, as shown in FIGS. 1 and 2B.

[0032] The shielding plate 4 shown in FIGS. 1 to 2C is an opaque plate-like portion. Being opaque can also be said to mean that it does not transmit light. The shielding plate 4 is, for example, flat. The shielding plate 4 has a size that allows it to cover at least the left lower leg LS and right lower leg RS of the subject M. When the subject M is seated in the chair 2, the shielding plate 4 is positioned higher than the left and right knees of the subject M and lower than the solar plexus, and is positioned so as to overlap at least the left lower leg LS and right lower leg RS of the subject M in a top view. In other words, when the subject M is seated in the chair 2, the shielding plate 4 is positioned so as to prevent the subject M from viewing at least the left lower leg LS and right lower leg RS of the subject M. Note that the positions in which the subject M is seated in the chair 2 include a state in which the left knee is extended, a state in which the right knee is extended, and a state in which both knees are bent.

[0033] The left light source unit 5A, the right light source unit 5B, and the central light source unit 5C are configured to be able to turn on and off according to instructions from the attention amount calculation device 7. The left light source unit 5A, the right light source unit 5B, and the central light source unit 5C each have at least one light-emitting element configured to be able to emit light. A specific example of the light-emitting element is an LED element. LED stands for Light Emitting Diode. The left light source unit 5A, the right light source unit 5B, and the central light source unit 5C may each have light-emitting elements of one color, or light-emitting elements of two or more colors. When the left light source unit 5A, the right light source unit 5B, and the central light source unit 5C each have light-emitting elements of two or more colors, the light emission intensities of the light-emitting elements of each color are adjusted, thereby allowing the left light source unit 5A, the right light source unit 5B, and the central light source unit 5C to switch the lighting colors.

[0034] In this embodiment, the left light source unit 5A and the right light source unit 5B are configured to be able to light up in two lighting colors. The two lighting colors of the left light source unit 5A will be referred to hereinafter as the first left lighting color and the second left lighting color. The two lighting colors of the right light source unit 5B will be referred to hereinafter as the first right lighting color and the second right lighting color. The first left lighting color and the second left lighting color are preferably colors that are 100° or more apart on the color wheel. The same applies to the first right lighting color and the second right lighting color. The first left lighting color and the first right lighting color may be the same color or different colors, but in this embodiment, they are the same color (specifically, blue). Similarly, the second left lighting color and the second right lighting color may be the same color or different colors, but in this embodiment, they are the same color (specifically, red).

[0035] On the other hand, the central light source unit 5C of this embodiment is configured to be able to light up in one lighting color. The lighting color of the central light source unit 5C will be referred to as the central lighting color hereinafter. It is preferable that the central lighting color is different from the first left lighting color, the second left lighting color, and the first right lighting color, and the second right lighting color. The central lighting color of this embodiment is green.

[0036] As shown in FIG. 1, the left light source unit 5A, the right light source unit 5B, and the central light source unit 5C are arranged in positions that are visible to a subject M seated in a chair 2. The left light source unit 5A, the right light source unit 5B, and the central light source unit 5C are arranged above the shading plate 4. For example, the left light source unit 5A, the right light source unit 5B, and the central light source unit 5C are arranged on the upper surface of the shading plate 4. Note that, for convenience of illustration in FIG. 1, the right light source unit 5B is shown as being slightly smaller than the left light source unit 5A, but in reality, the left light source unit 5A and the right light source unit 5B are the same size.

[0037] 2A and 2C, the left light source unit 5A is disposed at a position that overlaps the left foot LF of the subject M in a top view when the left knee is extended, and does not overlap the left foot LF of the subject M in a top view when both knees are bent. Specifically, the left light source unit 5A is disposed at a position that overlaps the ankle of the left foot LF of the subject M (more specifically, the center of the left ankle) in a top view when the left knee is extended.

[0038] 2B and 2C, the right light source unit 5B is disposed at a position that overlaps with the right foot RF of the subject M in a top view when the right knee is extended, and does not overlap with the right foot RF of the subject M in a top view when both knees are bent. Specifically, the right light source unit 5B is disposed at a position that overlaps with the ankle of the right foot RF of the subject M (more specifically, the center of the right ankle) in a top view when the right knee is extended.

[0039] As shown in FIGS. 2A to 2C, the central light source unit 5C is disposed at a position where it does not overlap with the subject M in a top view in any of the states in which the left knee is extended, the right knee is extended, and both knees are bent. The central light source unit 5C is disposed at a position closer to the subject M seated in the chair 2 than the left light source unit 5A and the right light source unit 5B. The distance between the central light source unit 5C and the left light source unit 5A and the distance between the central light source unit 5C and the right light source unit 5B are set at intervals such that when the subject M seated in the chair 2 gazes at the central light source unit 5C, the left light source unit 5A and the right light source unit 5B are within the peripheral visual field of the subject M.

[0040] The pressing unit 6 is configured to be able to be held by the subject M. The pressing unit 6 is configured to be able to be pressed by the subject M. As shown in FIG. 3 , the pressing unit 6 is electrically connected to the attention amount calculation device 7. The attention amount calculation device 7 can detect that the subject M has pressed the pressing unit 6.

[0041] The attention amount calculation device 7 includes a display unit 71 , an operation unit 72 , and a control unit 73 .

[0042] The display unit 71 is configured to be able to display an image. A display is a specific example of the display unit 71. The display unit 71 is disposed in a position where it can be viewed by the operator P.

[0043] The operation unit 72 is a device that accepts input operations by the operator P. Specific examples of the operation unit 72 include a keyboard and a touch panel.

[0044] The control unit 73 is mainly configured with a well-known microcomputer having a CPU 731 and a semiconductor memory 732 such as a ROM, RAM, or flash memory. Each function of the control unit 73 is realized by the CPU 731 executing a program stored in the semiconductor memory 732. Furthermore, by executing this program, a method corresponding to the program is performed. The control unit 73 may include one microcomputer or multiple microcomputers.

[0045] [2. Processing] [2-1. Processing performed in the attention amount calculation system] The processing executed in the attention amount calculation system 1 will be described with reference to FIGS.

[0046] First, in A101, the control unit 73 displays a condition selection image on the display unit 71. The condition selection image is an image that prompts the user to select an implementation condition. There are three implementation conditions: left knee extension, right knee extension, and both knees flexed. The condition selection image may be, for example, an image that presents three options for the implementation condition together with the text "Please select the implementation condition."

[0047] Next, in A102, the operator P selects an implementation condition. Then, in A102, the operator P instructs the subject M to assume a state corresponding to the selected implementation condition. If the operator P selects the left knee extension state, the operator P instructs the subject M, for example, "Extend your left knee and place your left foot on the footrest. Bend your right knee and place your right foot on the floor." If the operator P selects the right knee extension state, the operator P instructs the subject M, for example, "Extend your right knee and place your right foot on the footrest. Bend your left knee and place your left foot on the floor." If the operator P selects the both knees extension state, the operator P instructs the subject M, for example, "Bend both knees and place both feet on the floor." Having received the instructions, the subject M bends or extends his or her left knee to assume the instructed state in A103.

[0048] Additionally, in A102, the operator P explains the implementation method to the subject M. Specifically, the operator P explains the following (i) to (vi).

[0049] (i) The central light source unit 5C and the left light source unit 5A or the right light source unit 5B are turned on in this order. (ii) The left light source unit 5A and the right light source unit 5B are illuminated in one of two lighting colors. (iii) When the central light source unit 5C is turned on, gaze at the central light source unit 5C, and use peripheral vision to recognize whether the left light source unit 5A or the right light source unit 5B is turned on and the color of the light. (iv) While gazing at the central light source unit 5C, if you recognize that the left light source unit 5A has been lit in the first left lighting color or the right light source unit 5B has been lit in the first right lighting color, press the pressing unit 6 as soon as possible. (v) When the pressing portion 6 is pressed, the left light source portion 5A or the right light source portion 5B that was turned on is turned off, so the pressing of the pressing portion 6 should be stopped. (vi) When the left light source unit 5A is lit in the second left lighting color and when the right light source unit 5B is lit in the second right lighting color, the pressing unit 6 is not pressed.

[0050] In this embodiment, the processes A101 to A110 are performed for all three implementation conditions. For example, for the second and subsequent executions of the processes A101 to A110, the description of the implementation method in A102 may be omitted.

[0051] Next, in A104, the operator P inputs the selected implementation conditions using the operation unit 72. The input implementation conditions are acquired by the control unit 73. Then, in A105, the control unit 73 stores the acquired implementation conditions.

[0052] Next, in A106, the control unit 73 turns on the central light source unit 5C and the left light source unit 5A or the right light source unit 5B in this order. As shown in FIG. 5, the control unit 73 turns on the left light source unit 5A or the right light source unit 5B when a predetermined gaze time Tf has elapsed since turning on the central light source unit 5C. In the example shown in FIG. 5, after the central light source unit 5C is turned on at time t1, the left light source unit 5A is turned on in the first left lighting color, or the right light source unit 5B is turned on in the first right lighting color, at time t2 when the gaze time Tf has elapsed. Furthermore, after the central light source unit 5C is turned on at time t5, the left light source unit 5A is turned on in the second left lighting color, or the right light source unit 5B is turned on in the second right lighting color, at time t6 when the gaze time Tf has elapsed. The gaze time Tf is, for example, between 800 milliseconds and 1600 milliseconds. The gaze time Tf may be determined by the control unit 73 within a range of, for example, 800 milliseconds or more and 1600 milliseconds or less each time the central light source unit 5C is turned on.

[0053] 5(a) to 5(g) are schematic diagrams showing the shielding plate 4 viewed from above in chronological order. In these schematic diagrams, the left light source unit 5A, the right light source unit 5B, or the central light source unit 5C that is lit is shown as a black figure. For convenience of illustration, the two lighting colors of the left light source unit 5A and the right light source unit 5B are distinguished by different figures.

[0054] At A107 shown in Fig. 4, when the subject M recognizes that the left light source unit 5A or the right light source unit 5B has been turned on, the subject M presses the pressing unit 6. Specifically, as shown in Fig. 5, when the subject M recognizes that the left light source unit 5A has been turned on in the first left lighting color or the right light source unit 5B has been turned on in the first right lighting color, the subject M presses the pressing unit 6 at A107. As shown in Fig. 4, at A107, the control unit 73 detects that the pressing unit 6 has been pressed.

[0055] When the control unit 73 detects at A107 that the pressing unit 6 has been pressed, it turns off the central light source unit 5C and the left light source unit 5A or the right light source unit 5B that have been turned on at A108. In the example shown in Fig. 5, since it is detected that the pressing unit 6 has been pressed at time t3, the central light source unit 5C and the left light source unit 5A or the right light source unit 5B that have been turned on are turned off at time t4.

[0056] Furthermore, if the control unit 73 does not detect that the pressing unit 6 has been pressed even after a predetermined waiting time Ts has elapsed since the left light source unit 5A or the right light source unit 5B was turned on, the control unit 73 turns off the lit central light source unit 5C and the left light source unit 5A or the right light source unit 5B at A108. In the example shown in FIG. 5, after the left light source unit 5A or the right light source unit 5B was turned on at time t6, pressing of the pressing unit 6 was not detected by time t7 when the waiting time Ts had elapsed, so the lit central light source unit 5C and the left light source unit 5A or the right light source unit 5B are turned off at time t7. The waiting time Ts is, for example, 1000 milliseconds.

[0057] Next, at A109 shown in FIG. 4, the control unit 73 calculates and stores the reaction time Ta. As shown in FIG. 5, the reaction time Ta is the time elapsed from the time the control unit 73 turns on the left light source unit 5A or the right light source unit 5B to the time the control unit 73 detects that the pressing unit 6 has been pressed. Specifically, the reaction time Ta is the time elapsed from the time the control unit 73 turns on the left light source unit 5A in the first left lighting color or the time the control unit 73 turns on the right light source unit 5B in the first right lighting color to the time the control unit 73 detects that the pressing unit 6 has been pressed. In the example shown in FIG. 5, at time t2, the left light source unit 5A is turned on in the first left lighting color or the right light source unit 5B is turned on in the first right lighting color. Then, at time t3, it is detected that the pressing unit 6 has been pressed. In this case, the time elapsed from time t2 to time t3 is calculated as the reaction time Ta (Ta = t3 - t2).

[0058] Returning to FIG. 4, the processes of A106 to A109 are repeated a predetermined number of times Ns. The number of times Ns is a positive number equal to or greater than 2. The number of times Ns is, for example, equal to or greater than 50 and equal to or less than 80. In this embodiment, the number of times Ns is set to 80. By repeating the processes of A106 to A109 the number of times Ns, the reaction time Ta is usually calculated multiple times.

[0059] In the next step A110, the control unit 73 calculates and stores the average value of the reaction times Ta calculated under the current implementation conditions. Specifically, the control unit 73 calculates the average value of the reaction times Ta in the following procedure.

[0060] First, the control unit 73 calculates a provisional average value of the reaction times Ta and its standard deviation SD using all the reaction times Ta calculated under the current implementation conditions.

[0061] Next, the control unit 73 excludes, as outliers, reaction times Ta outside the "provisional average value ±2SD" from the reaction times Ta calculated under the current implementation conditions. A reaction time Ta shorter than the "provisional average value -2SD" means that the time it took for the subject M to press the pressing unit 6 was extremely short for the subject M. In this case, the subject M may have pressed the pressing unit 6 in anticipation of the lighting of the left light source unit 5A and the right light source unit 5B. On the other hand, a reaction time Ta longer than the "provisional average value +2SD" means that the time it took for the subject M to press the pressing unit 6 was extremely long for the subject M. In this case, the subject M may have had a decreased level of arousal. Therefore, a reaction time Ta outside the "provisional average value ±2SD" may not accurately reflect the subject M's level of reaction to the left light source unit 5A and the right light source unit 5B. For this reason, the control unit 73 is configured to exclude, as outliers, reaction times Ta outside the "provisional average value ±2SD."

[0062] Next, the control unit 73 calculates the average value of the reaction time Ta using the remaining reaction times Ta from which the outliers have been removed. Once the control unit 73 stores this average value, the process returns to A101.

[0063] When the processing of A101 to A110 has been completed for all implementation conditions, the control unit 73 calculates the body-specific attention amount in A111. The control unit 73 calculates the body-specific attention amount for the left foot LF of the subject M based on the following formula (1). The body-specific attention amount for the left foot LF of the subject M is the degree of potential attention that the subject M pays to his or her own left foot LF. In addition, the control unit 73 calculates the body-specific attention amount for the right foot RF of the subject M based on the following formula (2). The body-specific attention amount for the right foot RF of the subject M is the degree of potential attention that the subject M pays to his or her own right foot RF.

[0064] Ta(LL)-Ta(EL) (1) Ta(RR)-Ta(ER) (2)

[0065] where Ta(LL) is the average value of the reaction time Ta when the left light source unit 5A is lit when the left knee is extended. Specifically, Ta(LL) is the average value of the reaction time Ta when the left light source unit 5A is lit in the first left lighting color when the left knee is extended. Ta(RR) is the average value of the reaction time Ta when the right light source unit 5B is lit when the right knee is extended. Specifically, Ta(RR) is the average value of the reaction time Ta when the right light source unit 5B is lit in the first right lighting color when the right knee is extended. Ta(EL) is the average value of the reaction time Ta when the left light source unit 5A is lit when both knees are bent. Specifically, Ta(EL) is the average value of the reaction time Ta when the left light source unit 5A is lit in the first left lighting color when both knees are bent. Ta(ER) is the average value of the reaction time Ta when the right light source unit 5B is lit when both knees are bent. Specifically, Ta(ER) is the average value of the reaction time Ta when the right light source unit 5B is lit in the first right lighting color in the state where both knees are bent.

[0066] In particular, in this embodiment, the control unit 73 calculates the body-specific attention amount for the left foot LF of the subject M based on the following equation (3). The control unit 73 calculates the body-specific attention amount for the right foot RF of the subject M based on the following equation (4).

[0067] {Ta(LR)-Ta(LL)}-{Ta(ER)-Ta(EL)} ···(3) {Ta(RL)-Ta(RR)}-{Ta(EL)-Ta(ER)} ···(4)

[0068] where Ta(LR) is the average value of the reaction time Ta when the right light source unit 5B is lit when the left knee is extended. Specifically, Ta(LR) is the average value of the reaction time Ta when the right light source unit 5B is lit in the first right lighting color when the left knee is extended. Ta(RL) is the average value of the reaction time Ta when the left light source unit 5A is lit when the right knee is extended. Specifically, Ta(RL) is the average value of the reaction time Ta when the left light source unit 5A is lit in the first left lighting color when the right knee is extended. Ta(LL), Ta(RR), Ta(EL), and Ta(ER) are as described above.

[0069] Equation (3) is transformed into the following equation (5). As is clear from equation (5), equation (3) includes equation (1). Calculation based on equation (3) corresponds to an example of calculation based on equation (1).

[0070] {Ta(LR)-Ta(LL)}-{Ta(ER)-Ta(EL)} ={Ta(LR)-Ta(ER)}-{Ta(LL)-Ta(EL)} ···(5)

[0071] Equation (4) is transformed into the following equation (6). As is clear from equation (6), equation (4) includes equation (2). Calculation based on equation (4) corresponds to an example of calculation based on equation (2).

[0072] {Ta(RL)-Ta(RR)}-{Ta(EL)-Ta(ER)} ={Ta(RL)-Ta(EL)}-{Ta(RR)-Ta(ER)} ···(6)

[0073] The control unit 73 calculates the body-specific attention amount for the left foot LF and the right foot RF of the subject M in A111, and then displays an image of the calculation result on the display unit 71 in A112. The calculation result image is an image that shows the body-specific attention amount calculated in A111. A series of processes ends in A112.

[0074] [2-2. Attention amount calculation process] In the processes of A101 to A112 described above, the attention amount calculation process executed by the CPU 731 of the control unit 73 will be described with reference to Figs. 6 to 8. The attention amount calculation process is a process for calculating a body-specific attention amount. The attention amount calculation process is executed when the power of the attention amount calculation device 7 is turned on.

[0075] In S101 shown in FIG. 6, the CPU 731 displays a condition selection image on the display unit 71.

[0076] Next, in S102, the CPU 731 determines whether or not the implementation conditions have been input via the operation unit 72. If the CPU 731 determines in S102 that the implementation conditions have not been input, it repeats the processing of S102.

[0077] On the other hand, if it is determined in S102 that the implementation conditions have been input, the CPU 731 stores the input implementation conditions in the semiconductor memory 732 in S103.

[0078] Next, in S104, the CPU 731 sets the count value N to 1 (N=1).

[0079] Next, in S105, the CPU 731 turns on the central light source unit 5C.

[0080] Next, in S106, the CPU 731 selects whether to light up the left light source unit 5A or the right light source unit 5B. The ratio of the number of times the CPU 731 lights up the right light source unit 5B to the number of times the CPU 731 lights up the left light source unit 5A during a period in which one implementation condition continues is determined in advance. This ratio is, for example, between 40% and 60%. In this embodiment, this ratio is set to 50%.

[0081] Furthermore, in S106, the CPU 731 selects which lighting color to use for the left light source unit 5A or the right light source unit 5B. If the CPU 731 selects to light the left light source unit 5A out of the left light source unit 5A and the right light source unit 5B, the CPU 731 selects either the first left lighting color or the second left lighting color as the lighting color. Furthermore, if the CPU 731 selects to light the right light source unit 5B out of the left light source unit 5A and the right light source unit 5B, the CPU 731 selects either the first right lighting color or the second right lighting color as the lighting color.

[0082] The ratio of the number of times the CPU 731 lights the left light source unit 5A in the second left lighting color to the number of times the CPU 731 lights the left light source unit 5A in the first left lighting color during a period in which one implementation condition continues is predetermined. This ratio is, for example, between 10% and 30%. In this embodiment, this ratio is set to 20%.

[0083] The ratio of the number of times the CPU 731 lights the right light source unit 5B in the second right lighting color to the number of times the CPU 731 lights the right light source unit 5B in the first right lighting color during a period in which one implementation condition continues is predetermined. This ratio is, for example, between 10% and 30%. In this embodiment, this ratio is set to 20%.

[0084] Next, in S107, the CPU 731 determines whether or not it was selected to turn on the left light source unit 5A in S106. If it is determined in S107 that it was selected to turn on the left light source unit 5A, the CPU 731 proceeds to S108. On the other hand, if it is determined in S107 that it was not selected to turn on the left light source unit 5A, in other words, if it is determined in S107 that it was selected to turn on the right light source unit 5B, the CPU 731 proceeds to S111.

[0085] In S108, the CPU 731 determines whether lighting in the first left lighting color was selected in S106.

[0086] If the CPU 731 determines in S108 that lighting in the first left lighting color has been selected, the process proceeds to S109. Then, in S109, the CPU 731 lights the left light source unit 5A in the first left lighting color.

[0087] On the other hand, if the CPU 731 determines in S108 that lighting in the first left lighting color has not been selected, in other words, if it determines in S108 that lighting in the second left lighting color has been selected, the process proceeds to S110. Then, in S110, the CPU 731 lights the left light source unit 5A in the second left lighting color.

[0088] In S111, the CPU 731 determines whether lighting in the first right lighting color was selected in S106.

[0089] When the CPU 731 determines in S111 that lighting in the first right lighting color has been selected, the process proceeds to S112. Then, in S112, the CPU 731 lights the right light source unit 5B in the first right lighting color.

[0090] On the other hand, if the CPU 731 determines in S111 that lighting in the first right lighting color has not been selected, in other words, if it determines in S111 that lighting in the second right lighting color has been selected, the process proceeds to S113. Then, in S113, the CPU 731 lights the right light source unit 5B in the second right lighting color.

[0091] In this way, the CPU 731 turns on the left light source unit 5A or the right light source unit 5B in any of S109, S110, S112, and S113. The CPU 731 is configured to turn on the left light source unit 5A or the right light source unit 5B in any of S109, S110, S112, and S113 when the gaze time Tf has elapsed since the central light source unit 5C was turned on in S105. When the processing of S109, S110, S112, or S113 is completed, the CPU 731 proceeds to S114 shown in FIG. 7.

[0092] The CPU 731 is configured to be able to detect that the pressing portion 6 has been pressed. In S114, the CPU 731 determines whether the pressing portion 6 has been pressed.

[0093] If the CPU 731 determines in S114 that the pressing unit 6 is not pressed, the process proceeds to S115. In S115, the CPU 731 determines whether the standby time Ts has elapsed since the left light source unit 5A or the right light source unit 5B was turned on in any of S109, S110, S112, and S113. If the CPU 731 determines in S115 that the standby time Ts has not elapsed since the left light source unit 5A or the right light source unit 5B was turned on, the process returns to S114.

[0094] On the other hand, if the CPU 731 determines in S115 that the standby time Ts has elapsed since the left light source unit 5A or the right light source unit 5B was turned on, the process proceeds to S116. The CPU 731 also proceeds to S116 if it determines in S114 that the pressing unit 6 has been pressed.

[0095] In S116, the CPU 731 turns off all of the light source units that are turned on. In other words, the CPU 731 turns off both the central light source unit 5C that was turned on in S105 and the left light source unit 5A or the right light source unit 5B that was turned on in any of S109, S110, S112, and S113.

[0096] Next, in S117, the CPU 731 calculates the reaction time Ta. Specifically, the CPU 731 calculates the reaction time Ta as the time elapsed from the time when the left light source unit 5A or the right light source unit 5B is turned on in any of S109, S110, S112, and S113 to the time when it detects in S114 that the pressing unit 6 has been pressed. The CPU 731 then stores the calculated reaction time Ta in the semiconductor memory 732 in association with the implementation conditions, the count number N, the light source unit that is turned on among the left light source unit 5A and the right light source unit 5B, and the lighting color thereof. For example, a storage destination table such as that shown in FIG. 8 may be prepared in advance in the semiconductor memory 732, and the CPU 731 may store the reaction time Ta, etc. in the storage destination table in S117. The example destination table shown in FIG. 8 is a table that can store, for each count number N under one implementation condition, the light source unit that is lit out of the left light source unit 5A and the right light source unit 5B, the lighting color, whether or not the pressing unit 6 is pressed, and the response time Ta.

[0097] 7, in the next step S118, the CPU 731 determines whether the count number N is equal to or greater than the number of repetitions Ns. In other words, the CPU 731 determines whether the count number N has reached the number of repetitions Ns.

[0098] If the CPU 731 determines in S118 that the count number N is less than the number of repetitions Ns, in other words, if the CPU 731 determines in S118 that the count number N has not reached the number of repetitions Ns, the CPU 731 proceeds to S119. Then, in S119, the CPU 731 increments the count number N by 1 (N=N+1) and then returns to S105.

[0099] On the other hand, if the CPU 731 determines in S118 that the count number N is equal to or greater than the number of repetitions Ns, in other words, if the CPU 731 determines in S118 that the count number N has reached the number of repetitions Ns, the CPU 731 proceeds to S120. Then, in S120, the CPU 731 calculates the average value of the reaction time Ta.

[0100] Specifically, the CPU 731 extracts, from among the reaction times Ta stored in the semiconductor memory 732 in association with the same implementation conditions, the reaction time Ta when the left light source unit 5A is lit in the first left lighting color as the reaction time Ta for the left space. The CPU 731 calculates a provisional average value of the reaction times Ta for the left space and its standard deviation SD(L) using all of the reaction times Ta for the left space. The CPU 731 then removes outliers from the reaction times Ta for the left space. The outliers are values ​​outside of "(the provisional average value of the reaction times Ta for the left space) ± 2SD(L)." The CPU 731 calculates the average value of the reaction times Ta for the left space using the remaining reaction times Ta for the left space after the outliers have been removed.

[0101] Furthermore, the CPU 731 extracts, from among the reaction times Ta stored in the semiconductor memory 732 in association with the same implementation conditions, the reaction time Ta when the right light source unit 5B is lit in the first right lighting color as the reaction time Ta for the right space. The CPU 731 calculates a provisional average value of the reaction times Ta for the right space and its standard deviation SD(R) using all of the reaction times Ta for the right space. The CPU 731 then removes outliers from the reaction times Ta for the right space. The outliers are values ​​outside of "(the provisional average value of the reaction times Ta for the right space) ± 2SD(R)." The CPU 731 calculates the average value of the reaction times Ta for the right space using the remaining reaction times Ta for the right space after the outliers have been removed.

[0102] The CPU 731 stores the calculated average values ​​of the reaction times Ta for the left space and the right space in association with the implementation conditions in the semiconductor memory 732. Although not shown in the figure, a table for storing these average values ​​in association with the implementation conditions may be prepared in advance in the semiconductor memory 732.

[0103] When the implementation condition is the left knee extension condition, the average values ​​of the reaction time Ta in the left space and the right space respectively correspond to the above-mentioned Ta(LL) and Ta(LR).When the implementation condition is the right knee extension condition, the average values ​​of the reaction time Ta in the left space and the right space respectively correspond to the above-mentioned Ta(RL) and Ta(RR).When the implementation condition is the both knees flexed state, the average values ​​of the reaction time Ta in the left space and the right space respectively correspond to the above-mentioned Ta(EL) and Ta(ER).

[0104] Next, in S121, the CPU 731 determines whether all the implementation conditions have been met. If the CPU 731 determines in S121 that all the implementation conditions have not been met, in other words, if the CPU 731 determines in S121 that there are implementation conditions that have not been met, the process returns to S101. On the other hand, if the CPU 731 determines in S121 that all the implementation conditions have been met, the process proceeds to S122.

[0105] In S122, the CPU 731 calculates the body-specific attention amount for the left foot LF of the subject M based on the above-mentioned formula (1). Specifically, the CPU 731 calculates the body-specific attention amount for the left foot LF of the subject M based on the above-mentioned formula (3). The CPU 731 also calculates the body-specific attention amount for the right foot RF of the subject M based on the above-mentioned formula (2). Specifically, the CPU 731 calculates the body-specific attention amount for the right foot RF of the subject M based on the above-mentioned formula (4). These body-specific attention amounts are calculated using Ta(LL), Ta(LR), Ta(RL), Ta(RR), Ta(EL), and Ta(ER) stored in the semiconductor memory 732.

[0106] Subsequently, in S123, the CPU 731 displays the calculation result image on the display unit 71. The CPU 731 may store the body specific attention amount calculated in S122 in the semiconductor memory 732 in association with information that identifies the subject M, such as the name of the subject M, for example.

[0107] When the process of S123 ends, the attention amount calculation process ends.

[0108] [3.Effects] According to the embodiment described above in detail, the following effects can be obtained.

[0109] (3a) In the attention amount calculation device 7, the CPU 731 is configured to turn on the left light source unit 5A and the right light source unit 5B. The CPU 731 is configured to be able to detect that the pressing unit 6 has been pressed by the subject M. The CPU 731 is configured to calculate a body-specific attention amount based on the reaction time Ta. Specifically, the CPU 731 is configured to calculate a body-specific attention amount for the left foot LF of the subject M based on equation (1). The CPU 731 is also configured to calculate a body-specific attention amount for the right foot RF of the subject M based on equation (2).

[0110] Equation (1) is the difference between Ta(LL) and Ta(EL). That is, Equation (1) is the difference between the reaction time Ta when the left light source unit 5A is turned on at a position overlapping the left foot LF of the subject M in a top view and the reaction time Ta when the left light source unit 5A is turned on at a position not overlapping the subject M in a top view. If the subject M is subconsciously paying attention to his / her left foot LF, the former reaction time Ta is considered to be shorter. Therefore, by using Equation (1), the body-specific attention amount for the left foot LF of the subject M can be calculated. For the same reason, by using Equation (2), the body-specific attention amount for the right foot RF of the subject M can be calculated. That is, according to the above-described configuration, the body-specific attention amount for the left foot LF and the right foot RF of the subject M can be calculated.

[0111] (3b) In this embodiment, the average values ​​of multiple reaction times Ta are used as Ta(LL) and Ta(EL) in formula (1) and as Ta(RR) and Ta(EL) in formula (2). With this configuration, the body-specific attention amount for the left foot LF and the right foot RF of the subject M can be calculated with even higher accuracy.

[0112] (3c) It is conceivable that the speed of reaction when the left light source unit 5A or the right light source unit 5B is turned on may vary depending on the subject M during the period during which one implementation condition continues. For example, it is conceivable that the subject M becomes tired as the number of times is increased, and the reaction to the left light source unit 5A or the right light source unit 5B becomes slower when the left light source unit 5A or the right light source unit 5B is turned on the Nsth time than when it is turned on the first time (i.e., the reaction time Ta becomes longer).

[0113] Therefore, in the attention amount calculation device 7, the CPU 731 is configured to calculate the body-specific attention amount for the left foot LF of the subject M based on formula (3). Also, the CPU 731 is configured to calculate the body-specific attention amount for the right foot RF of the subject M based on formula (4).

[0114] "Ta(LR)-Ta(LL)" and "Ta(ER)-Ta(EL)" in formula (3), and "Ta(RL)-Ta(RR)" and "Ta(EL)-Ta(ER)" in formula (4) are respectively the difference between the reaction time Ta to the left light source unit 5A and the reaction time Ta to the right light source unit 5B under one implementation condition (i.e., either the left knee extended state, the right knee extended state, or both knees flexed state). By using formulas (3) and (4), it is possible to calculate with even higher accuracy the body-specific attention amount for the left foot LF and the right foot RF of subject M, for example, even for subject M, whose reaction time Ta is prone to variation.

[0115] (3d) In the attention amount calculation device 7, the CPU 731 is configured to selectively light the left light source unit 5A in a first left lighting color or light the left light source unit 5A in a second left lighting color. The CPU 731 is configured to selectively light the right light source unit 5B in a first right lighting color or light the right light source unit 5B in a second right lighting color. The CPU 731 is configured to calculate, as the reaction time Ta, the time that has elapsed from the time the left light source unit 5A is lighted in the first left lighting color or the time the right light source unit 5B is lighted in the first right light source color to the time it is detected that the pressing unit 6 has been pressed.

[0116] According to this configuration, for example, when the left light source unit 5A is lit in the second left lighting color or when the right light source unit 5B is lit in the second right lighting color, the subject M can be instructed not to press the pressing unit 6, thereby making it easier for the subject M to maintain concentration. Therefore, the reaction time Ta of the subject M, and therefore the body-specific attention amount for the left foot LF and the right foot RF, can be calculated with even higher accuracy.

[0117] (3e) During a period in which one implementation condition continues, the ratio of the number of times the CPU 731 lights up the left light source unit 5A in the second left lighting color to the number of times the CPU 731 lights up the left light source unit 5A in the first left lighting color is, for example, 10% or more and 30% or less. During a period in which one implementation condition continues, the ratio of the number of times the CPU 731 lights up the right light source unit 5B in the second right lighting color to the number of times the CPU 731 lights up the right light source unit 5B in the first right lighting color is also, for example, 10% or more and 30% or less.

[0118] According to this configuration, the effect of (3d) above can be obtained while preventing the time until one implementation condition is completed from becoming too long.

[0119] (3f) The first left lighting color and the second left lighting color are, for example, colors that are 100° or more apart on the color wheel. The first right lighting color and the second right lighting color are also, for example, colors that are 100° or more apart on the color wheel. With this configuration, it is possible for the subject M to easily distinguish between the first left lighting color and the second left lighting color. It is possible for the subject M to easily distinguish between the first right lighting color and the second right lighting color. Therefore, it is possible to prevent the subject M from accidentally pressing the pressing unit 6. As a result, it is possible to calculate the reaction time Ta of the subject M, and therefore the body-specific attention amount for the left foot LF and the right foot RF, with even higher accuracy.

[0120] (3g) In the attention amount calculation device 7, the CPU 731 is configured to turn on the central light source unit 5C before turning on the left light source unit 5A or the right light source unit 5B. With this configuration, the subject M can easily keep his / her line of sight constant by gazing at the central light source unit 5C. Therefore, the reaction time Ta of the subject M, and therefore the body-specific attention amount for the left foot LF and the right foot RF, can be calculated with even higher accuracy.

[0121] (3h) The attention amount calculation system 1 includes a shielding plate 4 in addition to a left light source unit 5A, a right light source unit 5B, and a pressing unit 6. The shielding plate 4 is positioned so as to prevent the subject M from viewing at least his or her own left lower leg LS and right lower leg RS when the subject M is seated in a chair 2. The left light source unit 5A and the right light source unit 5B are positioned above the shielding plate 4.

[0122] This configuration can prevent the subject M from directly recognizing the positions of his or her own left lower leg LS and right lower leg RS, and therefore the body-specific attention amount for the left foot LF and right foot RF of the subject M can be calculated with even higher accuracy.

[0123] (3i) The attention amount calculation system 1 further includes a left footrest 3A and a right footrest 3B. With this configuration, the subject M can easily assume an extended left knee state by placing at least one of the left lower leg LS and the left foot LF on the left footrest 3A. In addition, the subject M can easily maintain an extended left knee state. Furthermore, the subject M can easily assume an extended right knee state by placing at least one of the right lower leg RS and the right foot RF on the right footrest 3B. In addition, the subject M can easily maintain an extended right knee state. Therefore, it is possible to easily reduce the load on the subject M when the subject M assumes or maintains an extended left knee or right knee state.

[0124] In this embodiment, the processes of S109, S110, S112, and S113 correspond to an example of a process performed by a light source control unit. The process of S114 corresponds to an example of a process performed by a detection unit. The processes of S117, S120, and S122 correspond to an example of a process performed by a calculation unit.

[0125] 4. Other Embodiments Although the embodiments of the present disclosure have been described above, the present disclosure is not limited to the above embodiments and can take various forms.

[0126] (4a) In the above embodiment, Ta(LL), Ta(LR), Ta(RL), Ta(RR), Ta(EL), and Ta(ER) in formulas (1) to (4) are average values ​​calculated from a plurality of reaction times Ta. When an average value is calculated from a plurality of reaction times Ta in this manner, for example, the number of reaction times Ta remaining after excluding outliers as in the above embodiment may be used, or all of the reaction times Ta may be used. Note that when outliers are excluded, the outliers are not limited to the "provisional average value ± 2SD" exemplified in the above embodiment.

[0127] (4b) Ta(LL), Ta(LR), Ta(RL), Ta(RR), Ta(EL), and Ta(ER) in formulas (1) to (4) do not necessarily have to be average values ​​calculated from a plurality of reaction times Ta. For example, Ta(LL), Ta(LR), Ta(RL), Ta(RR), Ta(EL), and Ta(ER) in formulas (1) to (4) may be representative values ​​other than average values, such as medians or modes calculated from a plurality of reaction times Ta.

[0128] (4c) For example, Ta(LL), Ta(LR), Ta(RL), Ta(RR), Ta(EL), and Ta(ER) in formulas (1) to (4) do not necessarily have to be determined from multiple reaction times Ta. Ta(LL), Ta(LR), Ta(RL), Ta(RR), Ta(EL), and Ta(ER) in formulas (1) to (4) may each be determined from a single reaction time Ta.

[0129] Specifically, for each of the left knee extended state, the right knee extended state, and the both knee extended state, a reaction time Ta when the left light source unit 5A is turned on and a reaction time Ta when the right light source unit 5B is turned on may be calculated. Then, each calculated reaction time Ta may be used as Ta(LL), Ta(LR), Ta(RL), Ta(RR), Ta(EL), and Ta(ER) in equations (1) to (4).

[0130] (4d) In the above embodiment, after turning on the left light source unit 5A or the right light source unit 5B, if the pressing unit 6 is pressed, or if the waiting time Ts has elapsed without pressing the pressing unit 6, the left light source unit 5A or the right light source unit 5B is turned off. Here, if at least one of the following examples 1 to 4 is repeated, it is possible that the subject M does not correctly understand the implementation method.

[0131] Example 1: The left light source unit 5A is lit in the first left lighting color, but the pressing unit 6 is not pressed before the waiting time Ts has elapsed. Example 2: The right light source unit 5B is lit in the first right lighting color, but the pressing unit 6 is not pressed before the waiting time Ts has elapsed. Example 3: The left light source unit 5A is lit in the second left lighting color, but the pressing unit 6 is pressed. Example 4: The right light source unit 5B is lit in the second right lighting color, but the pressing unit 6 is pressed.

[0132] For this reason, for example, when at least one of the above-mentioned Examples 1 to 4 has been performed a predetermined number of times or more requiring caution, when the calculation result image is displayed on the display unit 71, a warning information image may also be displayed on the display unit 71. The warning information image is an image indicating that the above-mentioned Examples 1 to 4 have been performed a predetermined number of times requiring caution.

[0133] Furthermore, for example, when at least one of the above examples 1 to 4 has been performed a cautionary number of times, a caution information image may be displayed on the display unit 71 at that point, and the attention amount calculation process may be terminated.

[0134] (4e) In the above embodiment, the left light source unit 5A and the right light source unit 5B are configured to be lit in two lighting colors. However, the left light source unit 5A and the right light source unit 5B do not necessarily have to be configured to be lit in two lighting colors. For example, they may be configured to be lit in one lighting color. In this case, the operator P instructs the subject M to press the pressing unit 6 when the left light source unit 5A or the right light source unit 5B lights up. That is, in the above embodiment, Ta(LL), Ta(RL), and Ta(EL) in equations (1), (3), and (4) are the reaction time Ta when the left light source unit 5A is lit in the first left lighting color, but these may simply be the reaction time Ta when the left light source unit 5A is lit. Furthermore, in the above embodiment, Ta(LR), Ta(RR), and Ta(ER) in equations (2) to (4) are the reaction times Ta when the right light source unit 5B is lit in the first right lighting color, but these may simply be the reaction times Ta when the right light source unit 5B is lit.

[0135] (4f) In the above embodiment, the body-specific attention amount for the left foot LF of the subject M is calculated based on the formula (3), and the body-specific attention amount for the right foot RF of the subject M is calculated based on the formula (4). However, for example, only one of these may be performed.

[0136] For example, only one of the following may be performed: calculating the amount of body-specific attention for the left foot LF of subject M based on equation (1), and calculating the amount of body-specific attention for the right foot RF of subject M based on equation (2).

[0137] (4g) In the above embodiment, the operator P selects the implementation conditions and explains the state to be taken and the implementation method to the subject M. However, the entity that selects the implementation conditions and explains the implementation method, etc. to the subject M does not necessarily have to be the operator P, and may be, for example, the control unit 73 (specifically, the CPU 731). When the control unit 73 explains the implementation method, etc. to the subject M, a notification unit (not shown) configured to be able to notify the subject M by image, sound, etc. may be used. That is, the attention amount calculation device 7 may further include, for example, a notification unit.

[0138] (4h) In the above embodiment, the attention amount calculation system 1 includes a left footrest 3A and a right footrest 3B. However, the attention amount calculation system 1 does not necessarily have to include two footrests, and may include, for example, one footrest. This one footrest may be configured to support at least one of the left lower leg LS and left foot LF of the subject M, and at least one of the right lower leg RS and right foot RF of the subject M. In other words, this one footrest may be configured to perform the functions of both the left footrest 3A and the right footrest 3B of the above embodiment.

[0139] (4i) For example, the attention amount calculation system 1 does not need to be provided with a footrest. In this case, the subject M seated on the chair 2 can assume a left knee extended state, for example, by extending the left knee and bringing the heel of the left foot LF into contact with the floor Y. Similarly, the subject M seated on the chair 2 can assume a right knee extended state, for example, by extending the right knee and bringing the heel of the right foot RF into contact with the floor Y.

[0140] (4j) The function of one component in the above embodiments may be distributed among multiple components, or the functions of multiple components may be integrated into one component. Also, part of the configuration of the above embodiments may be omitted. Furthermore, at least part of the configuration of the above embodiments may be added to or substituted for the configuration of another of the above embodiments.

[0141] (4k) The present disclosure can be realized in various forms, including the attention amount calculation device 7 described above, an attention amount calculation system 1 having the attention amount calculation device 7 as a component, a computer program for causing a computer to function as the attention amount calculation device 7, a medium such as a semiconductor memory 732 on which this computer program is recorded, and a method for calculating body-specific attention amount.

[0142] [Technical idea disclosed in this specification] [Item 1] An attention amount calculation device configured to calculate a body-specific attention amount indicating a degree of potential attention of a subject to his or her own body, a light source control unit configured to turn on the left light source unit and the right light source unit; a detection unit configured to detect that the pressing unit has been pressed by the subject; a calculation unit configured to calculate the body-specific attention amount based on a reaction time that is the time elapsed from when the light source control unit turns on the left light source unit or the right light source unit to when the detection unit detects that the pressing unit is pressed; and Equipped with the left light source unit is arranged at a position visible to the seated subject, and overlaps the left foot of the subject in a left knee extension state in which the seated subject extends the left knee and bends the right knee, and does not overlap the left foot of the subject in a double knee flexion state in which the seated subject bends both knees, the right light source unit is arranged at a position that is visible to the seated subject, overlaps with the right foot of the subject when the seated subject is in a right knee extension state in which the left knee is bent and the right knee is extended, and does not overlap with the right foot of the subject when the seated subject is in a both knee flexed state, The calculation unit is configured to perform at least one of calculating the body-specific attention amount for the subject's left foot based on the following formula (1), and calculating the body-specific attention amount for the subject's right foot based on the following formula (2). Ta(LL)-Ta(EL) (1) Ta(RR)-Ta(ER) (2) (where Ta(LL) is the reaction time when the light source control unit turns on the left light source unit in the left knee extended state; Ta(RR) is the reaction time when the light source control unit turns on the right light source unit in the right knee extended state; Ta(EL) is the reaction time when the light source control unit turns on the left light source unit in the both knees bent state; and Ta(ER) is the reaction time when the light source control unit turns on the right light source unit in the both knees bent state.)

[0143] [Item 2] The attention amount calculation device according to item 1, The calculation unit is configured to perform at least one of calculating the body-specific attention amount for the subject's left foot based on the following equation (3), and calculating the body-specific attention amount for the subject's right foot based on the following equation (4). {Ta(LR)-Ta(LL)}-{Ta(ER)-Ta(EL)} ···(3) {Ta(RL)-Ta(RR)}-{Ta(EL)-Ta(ER)} ···(4) (wherein Ta(LL) is the reaction time when the light source control unit turns on the left light source unit in the left knee extended state. Ta(LR) is the reaction time when the light source control unit turns on the right light source unit in the left knee extended state. Ta(RL) is the reaction time when the light source control unit turns on the left light source unit in the right knee extended state. Ta(RR) is the reaction time when the light source control unit turns on the right light source unit in the right knee extended state. Ta(EL) is the reaction time when the light source control unit turns on the left light source unit in the both knees bent state. Ta(ER) is the reaction time when the light source control unit turns on the right light source unit in the both knees bent state.)

[0144] [Item 3] Item 1 or Item 2, the attention amount calculation device the light source control unit is configured to selectively light the left light source unit in a first left lighting color and light the left light source unit in a second left lighting color, and to selectively light the right light source unit in a first right lighting color and light the right light source unit in a second right lighting color, The reaction time is the time elapsed from the time when the light source control unit turns on the left light source unit in the first left lighting color, or the time when the light source control unit turns on the right light source unit in the first right lighting color, to the time when the detection unit detects that the pressing unit has been pressed.

[0145] [Item 4] Item 3. The attention amount calculation device according to item 3, a ratio of the number of times that the light source control unit turns on the left light source unit in the second left lighting color to the number of times that the light source control unit turns on the left light source unit in the first left lighting color within a predetermined period is 10% or more and 30% or less; An attention amount calculation device, wherein the ratio of the number of times the light source control unit turns on the right light source unit in the second right lighting color to the number of times the light source control unit turns on the right light source unit in the first right lighting color within a specified period is 10% or more and 30% or less.

[0146] [Item 5] An attention amount calculation system, An attention amount calculation device according to any one of items 1 to 4; the left light source unit and the right light source unit configured to be lit; The pressing unit configured to be pressed by the subject; An attention amount calculation system comprising:

[0147] [Item 6] A computer program for causing a computer to function as an attention amount calculation device configured to calculate a body-specific attention amount indicating a degree of potential attention of a subject to his or her own body, turning on the left light source unit and the right light source unit; Detecting that the pressing unit is pressed by the subject; Calculating the body-specific attention amount based on a reaction time that is the time that has elapsed from when the left light source unit or the right light source unit is turned on to when it is detected that the pressing unit is pressed; Including, the left light source unit is arranged at a position visible to the seated subject, and overlaps the left foot of the subject in a left knee extension state in which the seated subject extends the left knee and bends the right knee, and does not overlap the left foot of the subject in a double knee flexion state in which the seated subject bends both knees, the right light source unit is arranged at a position that is visible to the seated subject, overlaps with the right foot of the subject when the seated subject is in a right knee extension state in which the left knee is bent and the right knee is extended, and does not overlap with the right foot of the subject when the seated subject is in a both knee flexed state, A computer program that performs at least one of the following: calculating the body-specific attention amount for the subject's left foot based on the following formula (1); and calculating the body-specific attention amount for the subject's right foot based on the following formula (2). Ta(LL)-Ta(EL) (1) Ta(RR)-Ta(ER) (2) (where Ta(LL) is the reaction time when the left light source unit is turned on in the left knee extended state; Ta(RR) is the reaction time when the right light source unit is turned on in the right knee extended state; Ta(EL) is the reaction time when the left light source unit is turned on in the both knees bent state; and Ta(ER) is the reaction time when the right light source unit is turned on in the both knees bent state.) [Explanation of symbols]

[0148] 1...attention amount calculation system, 2...chair, 3A...left footrest, 3B...right footrest, 4...shield, 5A...left light source unit, 5B...right light source unit, 5C...central light source unit, 6...pressure unit, 7...attention amount calculation device, 71...display unit, 72...operation unit, 73...control unit, 731...CPU, 732...semiconductor memory, LS...left lower leg, LF...left foot, RS...right lower leg, RF...right foot, M...subject, P...operator, Ta...reaction time, Tf...gazing time, Ts...waiting time.

Claims

1. An attention amount calculation device configured to calculate a body-specific attention amount indicating a degree of potential attention of a subject to his or her own body, a light source control unit configured to turn on the left light source unit and the right light source unit; a detection unit configured to detect that the pressing unit has been pressed by the subject; a calculation unit configured to calculate the body-specific attention amount based on a reaction time that is the time elapsed from when the light source control unit turns on the left light source unit or the right light source unit to when the detection unit detects that the pressing unit is pressed; and Equipped with the left light source unit is arranged at a position visible to the seated subject, and overlaps the left foot of the subject in a left knee extension state in which the seated subject extends the left knee and bends the right knee, and does not overlap the left foot of the subject in a double knee flexion state in which the seated subject bends both knees, the right light source unit is arranged at a position that is visible to the seated subject, overlaps with the right foot of the subject when the seated subject is in a right knee extension state in which the left knee is bent and the right knee is extended, and does not overlap with the right foot of the subject when the seated subject is in a both knee flexed state, The calculation unit is configured to perform at least one of calculating the body-specific attention amount for the subject's left foot based on the following formula (1), and calculating the body-specific attention amount for the subject's right foot based on the following formula (2). Ta(LL)-Ta(EL)...(1) Ta(RR)-Ta(ER)...(2) (wherein Ta(LL) is the reaction time when the light source control unit turns on the left light source unit in the left knee extended state; Ta(RR) is the reaction time when the light source control unit turns on the right light source unit in the right knee extended state; Ta(EL) is the reaction time when the light source control unit turns on the left light source unit in the both knees bent state; and Ta(ER) is the reaction time when the light source control unit turns on the right light source unit in the both knees bent state.)

2. The attention amount calculation device according to claim 1 , The calculation unit is configured to perform at least one of calculating the body-specific attention amount for the subject's left foot based on the following equation (3), and calculating the body-specific attention amount for the subject's right foot based on the following equation (4). {Ta(LR)-Ta(LL)}-{Ta(ER)-Ta(EL)}...(3) {Ta(RL)-Ta(RR)}-{Ta(EL)-Ta(ER)}...(4) (Here, Ta(LL) is the reaction time when the light source control unit turns on the left light source unit in the left knee extended state. Ta(LR) is the reaction time when the light source control unit turns on the right light source unit in the left knee extended state. Ta(RL) is the reaction time when the light source control unit turns on the left light source unit in the right knee extended state. Ta(RR) is the reaction time when the light source control unit turns on the right light source unit in the right knee extended state. Ta(EL) is the reaction time when the light source control unit turns on the left light source unit in the both knees bent state. Ta(ER) is the reaction time when the light source control unit turns on the right light source unit in the both knees bent state.)

3. 3. The attention amount calculation device according to claim 1, the light source control unit is configured to selectively light the left light source unit in a first left lighting color and light the left light source unit in a second left lighting color, and to selectively light the right light source unit in a first right lighting color and light the right light source unit in a second right lighting color, The reaction time is the time elapsed from the time when the light source control unit turns on the left light source unit in the first left lighting color, or the time when the light source control unit turns on the right light source unit in the first right lighting color, to the time when the detection unit detects that the pressing unit has been pressed.

4. The attention amount calculation device according to claim 3, a ratio of the number of times that the light source control unit turns on the left light source unit in the second left lighting color to the number of times that the light source control unit turns on the left light source unit in the first left lighting color within a predetermined period is 10% or more and 30% or less, An attention amount calculation device, wherein the ratio of the number of times the light source control unit lights the right light source unit in the second right lighting color to the number of times the light source control unit lights the right light source unit in the first right lighting color within a specified period is 10% or more and 30% or less.

5. An attention amount calculation system, An attention amount calculation device according to claim 1 or 2; the left light source unit and the right light source unit configured to be lit; The pressing unit configured to be pressed by the subject; An attention amount calculation system comprising:

6. A computer program for causing a computer to function as an attention amount calculation device configured to calculate a body-specific attention amount indicating a degree of potential attention of a subject to his or her own body, turning on the left light source unit and the right light source unit; Detecting that the pressing unit is pressed by the subject; Calculating the body-specific attention amount based on a reaction time that is the time that has elapsed from when the left light source unit or the right light source unit is turned on to when it is detected that the pressing unit is pressed; Including, the left light source unit is arranged at a position visible to the seated subject, and overlaps the left foot of the subject in a left knee extension state in which the seated subject extends the left knee and bends the right knee, and does not overlap the left foot of the subject in a double knee flexion state in which the seated subject bends both knees, the right light source unit is arranged at a position that is visible to the seated subject, overlaps with the right foot of the subject when the seated subject is in a right knee extension state in which the left knee is bent and the right knee is extended, and does not overlap with the right foot of the subject when the seated subject is in a both knee flexed state, A computer program that performs at least one of the following: calculating the body-specific attention amount for the subject's left foot based on the following formula (1); and calculating the body-specific attention amount for the subject's right foot based on the following formula (2). Ta(LL)-Ta(EL)...(1) Ta(RR)-Ta(ER)...(2) (where Ta(LL) is the reaction time when the left light source unit is turned on in the left knee extended state; Ta(RR) is the reaction time when the right light source unit is turned on in the right knee extended state; Ta(EL) is the reaction time when the left light source unit is turned on in the both knees bent state; and Ta(ER) is the reaction time when the right light source unit is turned on in the both knees bent state.)

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