Brain activity information recording device, analysis device, brain activity information recording method, analysis method, and computer program

Abstract

To obtain more accurate information from those involved in the accident. [Solution] A brain activity information recording device comprising a control unit that acquires brain activity information of the operator of a mobile object and records the brain activity information of the mobile object before an accident occurs in a recording device.

Description

Technical Field

[0001] The present invention relates to a brain activity information recording device, an analysis device, a brain activity information recording method, an analysis method, and a computer program.

Background Art

[0002] Techniques for preventing vehicle accidents have been proposed. For example, Patent Document 1 proposes a technique for determining the occurrence of an accident based on a change in the traveling speed of a vehicle and issuing an alarm. However, as long as the occurrence of an accident cannot be reduced to zero, it is also important to correctly grasp the situation at the time of the accident. Therefore, various techniques have been proposed to grasp the situation when a moving object such as a vehicle has an accident. For example, an accident recording device called an event data recorder is installed in a vehicle to record information on the vehicle before and after an accident. By analyzing the information thus recorded, it is possible to grasp to some extent what events occurred before and after the accident.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, even if information on the moving object before and after an accident can be grasped to some extent, it has been difficult to clarify what the person involved in the accident of the moving object (such as the perpetrator or victim of the accident: hereinafter referred to as "person involved in the accident") recognized before the accident and what they did not recognize (hereinafter referred to as "recognition information"). That is, regarding the recognition information, it was necessary to rely on the testimony of the person involved in the accident himself / herself, and when false testimony was given, correct recognition information could not be obtained.

[0005] This invention has been made in view of the circumstances described above, and provides a technology that enables more accurate acquisition of perception information of those involved in an accident. [Means for solving the problem]

[0006] One aspect of the present invention is a brain activity information recording device that includes a control unit that acquires brain activity information of an operator of a mobile object and records the brain activity information before an accident occurs with the mobile object in a recording device.

[0007] One aspect of the present invention is an analysis device comprising a control unit that acquires recognition information of an operator by analyzing brain activity information of an operator of a mobile object that has been involved in an accident, and the brain activity information of the operator of the mobile object that occurred before the accident occurred.

[0008] One aspect of the present invention is the above-described analysis apparatus, wherein the control unit outputs accident information indicating the operation or control content of the moving body before the accident, and the recognition information.

[0009] One aspect of the present invention is a brain activity information recording method comprising the steps of acquiring brain activity information of an operator of a mobile object and recording the brain activity information prior to an accident involving the mobile object in a recording device.

[0010] One aspect of the present invention is an analysis method comprising an analysis step of obtaining recognition information of an operator by analyzing brain activity information of an operator of a mobile object that has been involved in an accident, which is brain activity information of the operator of the mobile object that occurred before the accident occurred.

[0011] One aspect of the present invention is a computer program for causing a computer to function as a brain activity information recording device, which includes a control unit that acquires brain activity information of an operator of a mobile object and records the brain activity information before an accident involving the mobile object occurs in a recording device.

[0012] One aspect of the present invention is a computer program for causing a computer to function as an analysis device, which includes a control unit that acquires recognition information of an operator by analyzing brain activity information of an operator of a mobile object that has been involved in an accident, and the brain activity information of the operator of the mobile object that was involved in the accident, prior to the accident. [Effects of the Invention]

[0013] This invention makes it possible to obtain more accurate perception information of those involved in an accident. [Brief explanation of the drawing]

[0014] [Figure 1] This is a schematic block diagram showing the system configuration of the analysis system 100 of the present invention. [Figure 2] This is a schematic block diagram showing a specific example of the functional configuration of the brain activity information recording device 10. [Figure 3] This figure shows specific examples of brain activity information stored by the brain activity information memory unit 131. [Figure 4] This is a schematic block diagram showing a specific example of the functional configuration of the analytical device 20. [Figure 5] This figure shows a specific example of accident information stored by the accident information storage unit 222. [Figure 6] This figure shows a concrete example of the analysis results. [Figure 7] This figure shows a concrete example of the analysis results. [Figure 8] This figure shows a schematic example of the hardware configuration of the information processing device 90 applied to this embodiment. [Modes for carrying out the invention]

[0015] FIG. 1 is a schematic block diagram showing the system configuration of the analysis system 100 of the present invention. The analysis system 100 includes a brain activity information recording device 10 and an analysis device 20. The analysis system 100 is used for analyzing an accident that occurred regarding the movement of a moving body. The brain activity information recording device 10 of the analysis system 100 may be applied to any moving body. For example, it may be applied to moving bodies such as automobiles, motorcycles, trucks, railway vehicles, airplanes, etc. In the following description, an automobile will be described as an example of a moving body.

[0016] The brain activity information recording device 10 records the brain activity information of the persons involved in the accident before the accident of the moving body occurs. The brain activity information of the persons involved in the accident recorded by the brain activity information recording device 10 is input to the analysis device 20. When inputting the brain activity information to the analysis device 20, any means may be taken. For example, it may be transmitted and received via a network, or may be input via a recording medium. The analysis device 20 acquires the recognition information of the persons involved in the accident before the accident of the moving body occurs based on the input brain activity information. By using the recognition information, it is easily determined what each person involved in the accident recognized when the accident occurred. Therefore, for example, based on other accident information (for example, information regarding the movement and control of the moving body. More specifically, information regarding the moving speed and brake operation of the moving body, etc.) and the recognition information, it becomes possible to objectively know the situation at the time of the accident in more detail. Hereinafter, the details of each device of the analysis system 100 will be described.

[0017] FIG. 2 is a schematic block diagram showing a specific example of the functional configuration of the brain activity information recording device 10. The brain activity information recording device 10 may be configured, for example, using an event data recorder (accident information measurement recording device, Event Data Recorder). When the moving body is an airplane, the brain activity information recording device 10 may be configured using a black box. The brain activity information recording device 10 may be configured using information devices such as smartphones, tablets, and dedicated devices. The brain activity information recording device 10 includes a communication unit 11, a brain activity information acquisition unit 12, a storage unit 13, and a control unit 14.

[0018] The communication unit 11 is an interface for sending and receiving signals with other devices. The communication unit 11 may be used as an interface for communicating with information devices or sensors installed on a mobile device, for example. In that case, the communication unit 11 may communicate wirelessly or via wired communication with each information device or sensor. In the case of wired communication, the communication unit 11 may be configured as a cable interface. The communication unit 11 may also be used as an interface for transmitting information recorded in the storage unit 13 to other devices. In this case as well, the communication unit 11 may communicate wirelessly or via wired communication with other devices. When wireless communication is used, the communication unit 11 may transmit information to information devices located in remote locations by performing mobile communication via a base station. The communication unit 11 may be implemented using multiple communication devices or interfaces. For example, the communication unit 11 may be configured using a device used as an interface for communicating with information devices or sensors installed on a mobile device, and a device used as an interface for transmitting information recorded in the storage unit 13 to other devices.

[0019] The brain activity information acquisition unit 12 acquires the brain activity information of the user of the brain activity information recording device 10. The user of the brain activity information recording device 10 is, for example, an operator of a moving body (such as a vehicle) on which the brain activity information recording device 10 is provided. The user of the brain activity information recording device 10 may be, for example, a person riding on the moving body. More specifically, when the moving body is a vehicle, the user of the brain activity information recording device 10 may be a driver who rides in the vehicle and drives, or when the moving body is an aircraft, the user of the brain activity information recording device 10 may be a pilot who boards the aircraft and pilots it. However, it is sufficient that the user of the brain activity information recording device 10 is a person who performs an operation related to the movement of the moving body, and it is not necessarily required to be riding on the moving body. For example, the user of the brain activity information recording device 10 may be a person who remotely operates the movement of the moving body. In this case, for example, the user of the brain activity information recording device 10 may operate the moving body while visually recognizing an image captured by a camera provided on the moving body using a device for remotely operating the movement of the moving body.

[0020] The brain activity information may be any information as long as it is information related to the brain activity of the user. The brain activity information may be, for example, information measured by an invasive measuring instrument or information measured by a non-invasive measuring instrument. As a specific example of a non-invasive measuring instrument, there is a device that captures electromagnetic changes in brain activity. More specifically, there are an electroencephalograph (EEG), a magnetoencephalograph (MEG), etc. The brain activity information may be, for example, any one or more of alpha waves, beta waves, and theta waves. The brain activity information acquisition unit 12 may be configured as a sensor that acquires brain activity information or as an interface that acquires brain activity information from a sensor (measuring instrument) that acquires brain activity information. The brain activity information acquisition unit 12 acquires the brain activity information necessary for the analysis device 20 to perform analysis on recognition information. For example, the brain activity information necessary for the analysis device 20 to analyze whether or not a specific color (such as red) was recognized may be acquired. The brain activity information acquisition unit 12 outputs the acquired brain activity information to the control unit 14.

[0021] The memory unit 13 is configured using a storage device such as a magnetic hard disk drive or a semiconductor storage device. The memory unit 13 stores data used by the control unit 14. The memory unit 13 stores data necessary when the control unit 14 performs processing. The memory unit 13 functions, for example, as a brain activity information storage unit 131. The brain activity information storage unit 131 stores brain activity information acquired by the brain activity information acquisition unit 12.

[0022] Figure 3 shows a specific example of brain activity information stored by the brain activity information storage unit 131. The brain activity information storage unit 131 may store values ​​of brain activity information acquired at predetermined intervals (for example, every 0.1 seconds, every 0.05 seconds, every 0.01 seconds, every 0.005 seconds, every 0.001 seconds, etc.). The brain activity information storage unit 131 may also store time-series information of values ​​indicating brain activity as described above as brain activity information.

[0023] The control unit 14 is composed of a processor such as a CPU (Central Processing Unit) and memory (main memory). The control unit 14 functions as a recording control unit 141 when the processor executes a program. Note that all or part of the functions of the control unit 14 may be implemented using hardware such as an ASIC (Application Specific Integrated Circuit), PLD (Programmable Logic Device), or FPGA (Field Programmable Gate Array). The above program may be recorded on a computer-readable recording medium. Computer-readable recording media include, for example, portable media such as flexible disks, magneto-optical disks, ROMs, CD-ROMs, and semiconductor memory devices (e.g., SSDs: Solid State Drives), as well as storage devices such as hard disks and semiconductor memory devices built into computer systems. The above program may be transmitted via a telecommunications line.

[0024] The control unit 14 may, for example, execute an application installed on its own device (brain activity information recording device 10). A specific example of such an application is an application provided to the brain activity information recording device 10 as a dedicated application for the analysis system 100. The control unit 14 operates according to the program of the application being executed. The recording control unit 141 records the brain activity information acquired by the brain activity information acquisition unit 12 in the brain activity information storage unit 131. The recording control unit 141 operates to ensure that the brain activity information is retained in the brain activity information storage unit 131 so as not to be lost in the event of an accident in the mobile body to which the brain activity information recording device 10 is associated. The recording control unit 141 may be configured to process according to any of the following operating modes, for example.

[0025] The first mode of operation of the recording control unit 141 will now be described. The recording control unit 141 repeatedly overwrites the latest brain activity information in the brain activity information storage unit 131 so that, for example, brain activity information for a predetermined time period retrospectively from the present is retained. When predetermined conditions indicating that an accident has occurred (hereinafter referred to as "accident occurrence conditions") are met, the recording control unit 141 stops subsequent overwriting and retains the information recorded in the brain activity information storage unit 131. The accident occurrence conditions may be defined in any way as long as they indicate that an accident has occurred. For example, it may be when a sensor installed on the mobile body acquires information indicating an impact of a predetermined value or higher. Such information may be acquired using sensors such as an acceleration sensor or strain gauge provided on the mobile body. The accident occurrence conditions may be set to the same conditions as those of an existing event data recorder.

[0026] A second mode of operation of the recording control unit 141 will now be described. The recording control unit 141 continues to record the latest brain activity information in the brain activity information storage unit 131 until a predetermined condition (hereinafter referred to as the "normal stop condition") indicating that the movement of the mobile body has been stopped normally is met. The normal stop condition is, for example, a condition indicating that the power source (engine or motor) of the mobile body has been stopped normally. If a predetermined condition (hereinafter referred to as the "normal start condition") indicating that the mobile body has become mobile after the normal stop condition has been met is met, the recording control unit 141 overwrites the information in the brain activity information storage unit 131 with the brain activity information obtained thereafter and records it. The normal start condition may be defined as, for example, a condition indicating that the power source (engine or motor) of the mobile body has been started normally and the mobile body has become mobile. The recording control unit 141 may be configured to stop recording thereafter when an accident condition is met and to retain the information recorded in the brain activity information storage unit 131 at that time.

[0027] The third operating mode of the recording control unit 141 will now be described. The third operating mode is similar to the first operating mode, but differs in that it transmits the recorded information. Specifically, it is as follows: The recording control unit 141 repeatedly overwrites the latest brain activity information in the brain activity information storage unit 131 so that, for example, brain activity information for a predetermined time period retrospectively from the present is retained. When the accident occurrence conditions are met, the recording control unit 141 stops the subsequent overwriting and transmits the information recorded in the brain activity information storage unit 131 to a predetermined destination via the communication unit 11. The predetermined destination is a destination that has been predetermined as the address of the device that records the brain activity information obtained at the time of the accident.

[0028] The fourth operating mode of the recording control unit 141 will now be described. The fourth operating mode is similar to the second operating mode, but differs in that it transmits the recorded information. Specifically, it is as follows: The recording control unit 141 continues to record the latest brain activity information in the brain activity information storage unit 131 until, for example, the normal stop condition is met. If the normal start condition is met after the normal stop condition is met, the recording control unit 141 overwrites the information in the brain activity information storage unit 131 with the brain activity information obtained thereafter and records it. If the accident condition is met, the recording control unit 141 stops recording thereafter and transmits the information recorded in the brain activity information storage unit 131 at that time to a predetermined destination via the communication unit 11.

[0029] Figure 4 is a schematic block diagram showing a specific example of the functional configuration of the analysis device 20. The analysis device 20 is configured using information processing equipment such as a personal computer or a server device. The analysis device 20 includes a data input unit 21, a storage unit 22, a control unit 23, and an output unit 24.

[0030] The data input unit 21 acquires brain activity information recorded by the brain activity information recording device 10. For example, the data input unit 21 may acquire brain activity information by communicating with the brain activity information recording device 10. For example, the data input unit 21 may acquire brain activity information by communicating with another information processing device that has brain activity information recorded by the brain activity information recording device 10. The communication may be wireless or wired. The data input unit 21 may also acquire brain activity information by reading data from a recording medium on which brain activity information is recorded. Specific examples of such recording media include recording devices such as USB memory sticks and recording media such as CD-ROMs. In addition, the data input unit 21 may acquire brain activity information by any other means.

[0031] The memory unit 22 is configured using a storage device such as a magnetic hard disk drive or a semiconductor storage device. The memory unit 22 stores data used by the control unit 23. The memory unit 22 may function, for example, as a brain activity information storage unit 221 and an accident information storage unit 222.

[0032] The brain activity information storage unit 221 stores brain activity information recorded by the brain activity information recording device 10.

[0033] The accident information storage unit 222 stores accident information. Accident information is information about the movement and control of a mobile object at the time immediately preceding the occurrence of an accident that occurred in the mobile object. Figure 5 is a diagram showing a specific example of accident information stored by the accident information storage unit 222. The accident information storage unit 222 has, for example, information indicating the movement of the mobile object (hereinafter referred to as "mobile object movement information") and information indicating the control of the mobile object (hereinafter referred to as "mobile object control information") acquired at predetermined intervals (e.g., every 0.1 seconds, every 0.05 seconds, every 0.01 seconds, etc.). The mobile object movement information may include, for example, information such as the mobile object's speed and acceleration. The mobile object control information may include, for example, information indicating that the brakes were applied to the mobile object, information indicating the direction of the steering wheel, information indicating that the accelerator was pressed, etc. The accident information stored by the accident information storage unit 222 may also be, for example, information recorded by an event data recorder mounted on the mobile object involved in the accident. The accident information storage unit 222 stores, for example, accident information recorded in the same mobile body and at the same time as the brain activity information stored in the brain activity information storage unit 221.

[0034] Returning to the explanation of Figure 4, the control unit 23 is composed of a processor such as a CPU and memory. The control unit 23 functions as an information control unit 231 and an analysis unit 232 when the processor executes a program. Note that all or part of the functions of the control unit 23 may be implemented using hardware such as an ASIC, PLD, or FPGA. The above program may be recorded on a computer-readable recording medium. Computer-readable recording media include, for example, portable media such as flexible disks, magneto-optical disks, ROMs, CD-ROMs, and semiconductor storage devices (e.g., SSDs), as well as storage devices such as hard disks and semiconductor storage devices built into computer systems. The above program may be transmitted via a telecommunications line.

[0035] The information control unit 231 controls the information input to or output from the analysis device 20. The information control unit 231 acquires, for example, brain activity information recorded by the brain activity information recording device 10 via the data input unit 21 and records the brain activity information in the brain activity information storage unit 221. The information control unit 231 acquires, for example, accident information recorded by the event data recorder via the data input unit 21 and records the accident information in the accident information storage unit 222. The information control unit 231 outputs, for example, the analysis results obtained by the analysis unit 232 via the output unit 24.

[0036] The analysis unit 232 performs analysis based on brain activity information stored in the brain activity information storage unit 221. The analysis performed by the analysis unit 232 is an analysis of the perception information of those involved in an accident that occurred on a moving object when the brain activity information was acquired. For example, the analysis unit 232 may analyze whether the person involved in the accident in the brain activity information recognized a specific color (e.g., red) at each point in the time series indicated by the brain activity information. Such an analysis may be performed based on, for example, the values ​​of the brain activity information and predetermined analysis criteria. For example, when analyzing whether the person recognized the color red, the analysis may be performed based on whether the brain activity information satisfies predetermined conditions (hereinafter referred to as "red recognition conditions"). For example, the analysis may be performed on what color was recognized, or on the flashing frequency.

[0037] For example, the analysis may be performed using a pre-trained model. Such a pre-trained model may be obtained by performing a training process using, for example, brain activity information obtained when multiple people were looking at the color red, and brain activity information obtained when they were looking at other colors, as training data. Such a pre-trained model may be obtained by performing a training process using, for example, a combination of brain activity information obtained when multiple people were looking at a certain color, and ground truth data indicating the color that was seen when that brain activity information was obtained, as training data. Such a pre-trained model may be obtained by performing a training process using the above-mentioned training data obtained for accident personnel whose brain activity information to be analyzed is obtained. When the analysis is performed using such a process, for example, based on brain activity information expressed in time series, time-series information of a value indicating the possibility that a specific color (for example, red) was seen by the accident personnel (for example, the probability that red was seen) may be obtained as the analysis result.

[0038] The analysis by the analysis unit 232 may be performed without using a pre-trained model. For example, by performing calculations on brain activity information using a predetermined algorithm or mathematical formula, a value indicating the possibility that a specific color (e.g., red) was seen by those involved in the accident may be obtained.

[0039] Figures 6 and 7 show specific examples of the analysis results. In Figures 6 and 7, the horizontal axis represents time, and the vertical axis represents the brake control value and the red recognition probability value. The brake control value on the vertical axis is information obtained from accident information, and a value closer to 100% indicates that the brakes were pressed to their maximum extent. The red recognition probability value on the vertical axis indicates that a value closer to 100% indicates that those involved in the accident recognized the color red. In the example in Figure 6, it can be seen that it was unlikely that those involved in the accident recognized the color red before the accident occurred, and that they pressed the brakes after the accident occurred. In the example in Figure 7, it can be seen that it was highly likely that those involved in the accident recognized the color red before the accident occurred, and that they pressed the brakes before the accident occurred.

[0040] The output unit 24 outputs information from the analysis device 20. The output unit 24 may output information in a format that is recognizable to the user of the analysis device 20. The output unit 24 may be an image display device such as a liquid crystal display or an organic EL (Electro-Luminescence) display. The output unit 24 may also be an interface for connecting an image display device to the analysis device 20. In this case, the output unit 24 generates a video signal for displaying image data and outputs the video signal to the image display device connected to it. The output unit 24 may also be a device that outputs sound, such as a speaker. The output unit 24 may also be an interface for connecting an audio output device such as a speaker or headphones to the analysis device 20. In this case, the output unit 24 generates an audio signal for playing audio data and outputs the audio signal to the audio output device connected to it. The output unit 24 may be configured as a touch panel or as a communication device. When configured as a communication device, the output unit 24 outputs information by transmitting information to an information device.

[0041] In the analysis system 100 configured in this way, the brain activity information recording device 10 records and stores the brain activity information of those involved in the accident immediately before the accident involving the moving object occurs. Therefore, after the accident, it becomes possible to obtain more accurate information about the perceptions of those involved in the accident at the time of the accident using the brain activity information of those involved.

[0042] Furthermore, by analyzing the brain activity information acquired by the brain activity information recording device 10 and the accident information acquired at the same time, it becomes possible to examine how the mobile vehicle moved and what kind of control was being performed, and to link this information with what the operator was perceiving at that time. For example, by obtaining analysis results like those shown in Figures 6 and 7, it becomes possible to more accurately determine what those involved in the accident perceived when the accident occurred, and what those involved perceived when the mobile vehicle was being controlled. Therefore, even if, for example, those involved in the accident claim to the effect that "I didn't see the red light," if brain activity information like that shown in Figure 7 is obtained, it becomes clear that there is a high probability that they saw the red light before the accident occurred.

[0043] Figure 8 is a schematic diagram of an example hardware configuration of an information processing device 90 applied to this embodiment. The information processing device 90 comprises a processor 91, main memory 92, communication interface 93, auxiliary storage device 94, input / output interface 95, and internal bus 96. The processor 91, main memory 92, communication interface 93, auxiliary storage device 94, and input / output interface 95 are connected to each other via the internal bus 96 so as to be able to communicate with each other. The information processing device 90 may be applied, for example, to a brain activity information recording device 10 and an analysis device 20. In this case, for example, the communication unit 11, data input unit 21, and output unit 24 may be configured using the communication interface 93. For example, the storage unit 13 and storage unit 22 may be configured using the auxiliary storage device 94. Also, the control unit 14 and control unit 23 may be configured using the processor 91 and main memory 92. Also, the data input unit 21 and output unit 24 may be configured using the input / output interface 95.

[0044] (modified version) The brain activity information recording device 10 may be integrated with a brain activity information recording device. For example, it may be integrated with a vehicle event data recorder or an aircraft black box.

[0045] Let's explain some other specific examples of recognition information. Recognition information may be, for example, information indicating the content of the operator's intention. More specifically, recognition information may be information indicating the content of the operator's intention regarding the operation of a moving object. To give an even more specific example, recognition information may be obtained that indicates whether the operator intends to move the moving object forward or to stop it. The analysis unit 232 may obtain the content of the operator's intention regarding the above-mentioned operation by performing an analysis based on brain activity information. Such analysis makes it possible to verify with higher accuracy when an accident occurs in which the accelerator and brake pedals are mistakenly pressed. For example, if the analysis of brain activity information determines that there was an intention to "stop," but the analysis of accident information at the same time reveals that the "accelerator" was pressed, it may be determined that there is a high possibility that it was a pedal mistake. For example, if the analysis of brain activity information determines that there was an intention to "move forward," but the analysis of accident information at the same time reveals that the "accelerator" was pressed, it may be determined that there is a high possibility that it was intentional.

[0046] While embodiments of this invention have been described in detail above with reference to the drawings, the specific configuration is not limited to these embodiments and includes designs and the like that do not depart from the spirit of this invention. [Explanation of Symbols]

[0047] 100…Analysis System, 10…Brain Activity Information Recording Device, 11…Communication Unit, 12…Brain Activity Information Acquisition Unit, 13…Memory Unit, 131…Brain Activity Information Memory Unit, 14…Control Unit, 141…Recording Control Unit, 20…Analysis Device, 21…Data Input Unit, 22…Memory Unit, 221…Brain Activity Information Memory Unit, 222…Accident Information Memory Unit, 23…Control Unit, 231…Information Control Unit, 232…Analysis Unit, 24…Output Unit

Claims

1. A brain activity information recording device comprising a control unit that acquires brain activity information of an operator of a mobile object and records the brain activity information prior to an accident involving the mobile object in a recording device.

2. An analysis device comprising a control unit that acquires recognition information of an operator by analyzing brain activity information of an operator of a mobile object that has been involved in an accident, and the brain activity information of the operator of the mobile object prior to the accident.

3. The analysis apparatus according to claim 2, wherein the control unit outputs accident information indicating the operation or control of the moving body before the accident, and the recognition information.

4. A brain activity information recording method comprising a recording step of acquiring brain activity information of an operator of a mobile object and recording the brain activity information prior to an accident involving the mobile object in a recording device.

5. An analysis method comprising an analysis step of obtaining recognition information of an operator by analyzing brain activity information of an operator of a mobile object that has been involved in an accident, and the brain activity information of the operator of the mobile object that was involved in the accident, prior to the accident.

6. A computer program for causing a computer to function as a brain activity information recording device, which includes a control unit that acquires brain activity information of an operator of a mobile object and records the brain activity information before an accident involving the mobile object occurs in a recording device.

7. A computer program for causing a computer to function as an analysis device comprising a control unit that acquires recognition information of an operator by analyzing brain activity information of an operator of a mobile object that has been involved in an accident, and the brain activity information of the operator of the mobile object that occurred before the accident occurred.

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