A method and system for evaluating the risk of suicidal ideation of a depressive patient based on a high-altitude virtual scene

Abstract

This invention discloses a method and system for assessing the risk of suicidal ideation in depressed patients based on a virtual high-altitude scenario. Subjects wear VR headsets, physiological monitoring devices, and eye-tracking glasses to record resting physiological data (I) and time deviation (I). In a "ground" scenario, a frame-and-bar test is performed, recording the error rate (ER_B). In the virtual high-altitude scenario, a high-altitude pain avoidance test and a time deviation test are performed at a certain height to establish a basis for assessing the subject's pain avoidance. At the maximum tolerable height, subjects perform a body balance test and a time deviation test, recording physiological data (II) and time deviation (III), and then perform the frame-and-bar test and time deviation test again, recording physiological data (III), time deviation (IV), and the error rate (ER_H). A basis for assessing the subject's fear of heights is established, and a risk level assessment of the subject's suicidal ideation risk is made. This invention objectively assesses the risk of suicidal ideation by observing the real performance of depressed patients in predicting effective factors for suicidal ideation.

Description

Technical Field

[0001] This invention relates to the field of suicide risk assessment technology, specifically to a method and system for assessing the risk of suicidal ideation in depressed patients based on a high-altitude virtual scene. Background Technology

[0002] According to a 2021 WHO (World Health Organization) survey, suicide is the second leading cause of death among people aged 15-29 worldwide, and can be categorized into three types: suicidal ideation, suicide attempt, and suicide completion. Suicidal ideation refers to thoughts or intentions involving death, suicide, and serious self-harm, including ideas about the plans, steps, and consequences of suicide. The development of suicidal ideation is closely related to subsequent suicide attempts and suicide completions. Clinical studies show that approximately 80% of suicide victims expressed suicidal thoughts in some form before attempting suicide, and the incidence of suicidal ideation among suicide attempts reaches 69.46%. The incidence of suicidal ideation among patients with depression is 53.1%, and the incidence within one month is 27.7%. Assessing suicidal ideation in patients with depression and intervening promptly can, to some extent, protect the lives of this group.

[0003] Currently, the main method for investigating the incidence of suicidal ideation is self-reported quantitative assessment to understand whether individuals have suicide plans, a history of suicide, substance abuse, etc.

[0004] Some surveys combine quantitative and qualitative methods, with professional psychologists conducting semi-structured interviews with clients according to a set interview / question outline. Based on the client's responses and potential suicide risk factors, they assess whether the client has suicidal ideation. However, there are many risk factors that can trigger suicidal ideation (e.g., biological factors, mental disorders, personal traits, interpersonal relationships, stressful events, etc.). Interviews are affected by factors such as duration, the emotional state of both parties, and the level of trust, and may not accurately address the core factors triggering suicidal ideation. Furthermore, the interview process may touch upon the client's traumatic experiences, causing secondary harm.

[0005] Some surveys employ purely quantitative methods, assessing suicidal ideation based on questionnaire results completed by respondents. In quantitative surveys of suicidal ideation, Western countries often use single-item surveys (i.e., using only one question), such as "Have you seriously considered killing yourself?". In my country, questionnaire surveys are more commonly used, with the "Beck Suicidal Ideation Scale" and the "Positive and Negative Suicidal Ideation Questionnaire" being frequently employed. However, the purpose of these assessments is very clear, and respondents may conceal their intentions when answering, thus their effectiveness needs improvement. Although some researchers abroad have begun to consider using projective tests to assess suicidal ideation, such as the Rorschach inkblot test and the Thematic Apperception Test (TAT), the results of these tests are highly dependent on subjective interpretation, and their reliability and validity need further verification. Summary of the Invention

[0006] To address the aforementioned issues, this invention provides a method and system for assessing the risk of suicidal ideation in depressed patients based on a high-altitude virtual scene. By observing the actual performance of depressed patients in terms of effective factors for predicting suicidal ideation, the risk of suicidal ideation in depressed patients can be objectively assessed.

[0007] The technical solution adopted is as follows:

[0008] On the one hand, the present invention provides a method for assessing the risk of suicidal ideation in depressed patients based on a high-altitude virtual scene, the method comprising the following steps:

[0009] Step 1: The subject wears a VR headset, physiological monitoring equipment, and eye-tracking glasses to record physiological data I of the subject in a resting upright state;

[0010] Step 2: The subject performs a time interval retrospective test in a calm state, and the time interval deviation I is recorded;

[0011] Step 3: Control the VR headset to present the test subject in a "ground" scene, perform a frame-bar test, and record the error rate ER_B;

[0012] Step 4: Adjust the VR headset to present a high-altitude scene, raise the test subject to the set height, and conduct a high-altitude pain avoidance test and a time-distance retrospective test to establish a basis for the test subject's pain avoidance assessment.

[0013] Step 5: Adjust the VR headset to present a high-altitude scene, allowing the subject to continue rising to the highest point, and conduct a body balance test and a time distance retrospective test, recording physiological data II and time distance deviation III;

[0014] Step 6: Keep the subject at the highest position in the high-altitude scene, perform the frame-and-bar test and the time interval retrospective test, and record the physiological data III, time interval deviation IV, and error rate ER_H;

[0015] Step 7: Establish the assessment criteria for the subject's fear of heights based on Steps 5 and 6;

[0016] Step 8: Based on the pain avoidance assessment criteria and the acrophobia response assessment criteria, assess the risk level of the test subject's suicidal ideation risk.

[0017] Furthermore, step 3 also includes first adjusting the high-altitude scene presented by the VR headset, conducting a behavioral avoidance test on the test subject to obtain the height limit H_MAX that the test subject can withstand, and then lowering the test subject to the "ground" scene; in step 5, the test subject is further raised to the height limit H_MAX.

[0018] Preferably, in step 4, the recorded parameters obtained during the high-altitude pain avoidance test and the time-distance retrospective test include:

[0019] The response times under punishment, neutrality, and reward conditions are denoted as RT_P, RT_N, and RT_I, respectively.

[0020] The proportion of invalid trials is denoted as invalid_P;

[0021] The rate of eye closure, denoted as null_P;

[0022] Invalid fixations are denoted as invalid_fixation.

[0023] Time difference deviation II, denoted as TPI_AID.

[0024] Preferably, in step 4, the basis for establishing the assessment of the subject's pain avoidance includes the following relationship: RT_P < (RT_N + RT_I) / 2;

[0025] Invalid_P > 0.3;

[0026] null_P+invalid_fixation>0.7;

[0027] If at least one of the above criteria for pain avoidance assessment is met, the test subject has a high pain avoidance tendency; otherwise, they have a low pain avoidance tendency.

[0028] Preferably, the time interval deviation I in steps 1 and 2 is denoted as TPI_B, and the recorded physiological data I includes: acceleration, skin conductance and heart rate, denoted as pose_B, SCL_B and HR_B, respectively;

[0029] The time deviation III in step 5 is denoted as TPI_pose, and the recorded physiological data II includes: acceleration, skin conductance and heart rate, denoted as pose_H, SCL_pose and HR_pose, respectively.

[0030] The time interval deviation IV in step 6 is denoted as TPI_FBT, and the recorded physiological data III includes skin conductance and heart rate, denoted as SCL_FBT and HR_FBT, respectively.

[0031] Preferably, in step 7, the criteria for assessing acrophobia include the following relationship:

[0032] pose_H>pose_B; ER_H>ER_B;

[0033] (TPI_AID+TPI_pose+TPI_FBT) / 3>TPI_B;

[0034] (SCL_pose+SCL_FBT) / 2>SCL_B; (HR_pose+HR_FBT) / 2>HR_B;

[0035] If at least three of the above criteria for assessing acrophobia are met, the subject has a strong acrophobia; otherwise, they have a weak acrophobia.

[0036] Furthermore, the method for assessing the risk level of suicidal ideation in step 8 is as follows:

[0037] If there is a tendency to avoid pain and a strong fear of heights, the risk level of suicidal ideation is assessed as Level 1.

[0038] If there is a high tendency to avoid pain and a strong fear of heights, the risk level of suicidal ideation is assessed as level two.

[0039] If there is a low tendency to avoid pain and a weak fear of heights, the risk level of suicidal ideation is assessed as level two.

[0040] If there is a high tendency to avoid pain and a weak fear of heights, the risk level of suicidal ideation is assessed as level three.

[0041] Furthermore, the higher the risk level of suicidal ideation, the greater the risk.

[0042] On the other hand, the present invention also provides a system for assessing the risk of suicidal ideation in depressed patients based on a high-altitude virtual scene. The system includes: a VR headset, worn on the head of the test subject, for presenting a virtual high-altitude scene task.

[0043] Physiological monitoring equipment is used to detect physiological data generated during the performance of tasks;

[0044] Eye-tracking glasses are used to collect eye-tracking data from test subjects during task execution.

[0045] The data processing module is used to record and calculate the physiological data, eye movement data and test data of the test subjects. The test data includes test data generated from performing behavioral avoidance tests, high-altitude pain avoidance tests, time interval regression tests and frame bar tests.

[0046] A reaction keyboard is used to perform key presses during the high-altitude pain avoidance test and the frame bar test.

[0047] The pain avoidance assessment module assesses the level of the subject's avoidance tendency based on the physiological data, eye movement data, and time distance deviation obtained by the data processing module when the subject rises to a set height in the virtual high-altitude scene.

[0048] The acrophobia assessment module evaluates the strength of the subject's acrophobia response based on the physiological data, time distance deviation I, time distance deviation II, and time distance deviation III obtained by the data processing module when the subject ascends to the highest position in the virtual high-altitude scene.

[0049] The suicidal ideation risk assessment module, based on the aforementioned pain avoidance assessment module and acrophobia response assessment module, assesses the risk level of the test subject's suicidal ideation risk.

[0050] Preferably, the physiological monitoring device is a smart physiological monitoring bracelet worn on the wrist of the subject.

[0051] The technical solution of the present invention has the following advantages:

[0052] A. This invention uses a VR headset to create a high-altitude virtual scene, which can make the assessment purpose more concealed. By analyzing the reaction time, eye movement data, motor performance, time distance deviation, and objective indicators such as skin conductance and heart rate of depressed patients in the process of performing tasks in the high-altitude scene, a more realistic reaction of depressed patients can be observed, and their internal state can be more accurately assessed.

[0053] B. This invention uses high-altitude stimulation to test pain avoidance motivation, which can induce the test subject to develop a pain avoidance state while avoiding triggering their unique traumatic experiences, thus protecting the test subject to a certain extent. Attached Figure Description

[0054] To more clearly illustrate the specific embodiments of the present invention, the accompanying drawings used in the specific embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0055] Figure 1 This is a diagram illustrating the method for assessing the risk of suicidal ideation in depressed patients based on a high-altitude virtual scene provided by the present invention;

[0056] Figure 2 This is a schematic diagram of the system composition structure provided by the present invention;

[0057] Figure 3 This is a flowchart of the frame bar test provided by the present invention;

[0058] Figure 4 This is the flowchart of the behavioral avoidance test provided by the present invention;

[0059] Figure 5 This is a flowchart of the high-altitude pain avoidance test provided by the present invention. Detailed Implementation

[0060] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0061] like Figure 1 and Figure 2 As shown, this invention provides a method for assessing the risk of suicidal ideation in depressed patients based on a high-altitude virtual scene, comprising the following steps:

[0062]

S01

[0063]

S02

[0064] The task of the time interval retrospective test is to require the test takers to estimate the time taken for the just completed segment, accurate to the second, and the experimenter to record it. The resulting time interval deviation (TPI) is the actual time taken for the segment divided by the time reported by the test taker.

[0065]

S03

[0066] Preferably, before performing this step, it is preferable to first test the subject's maximum tolerable height, that is, to first conduct a behavioral avoidance test on the subject, such as... Figure 4As shown. First, adjust the VR headset so that the subject stands on the "elevator." The elevator gradually rises 2.5m. The subject steps out of the "elevator" and walks to the end of the extension platform. The subject looks around for more than 15 seconds and assesses their anxiety level (0-10 points). When the subject meets the condition that the elevator rises less than 6 times and the anxiety level is less than 10, the elevator continues to rise, and the subject's anxiety level is assessed again until the above two conditions are no longer met. The task ends, and the final height is marked to obtain the subject's height limit H_MAX. Then, the subject is lowered to the "ground" scene to perform a frame and bar test, and the error rate ER_B is recorded.

[0067] The specific frame bar testing procedure is as follows: Figure 3 As shown.

[0068] The computer transmits the frame-and-bar test task to the VR headset. The gaze point "+" is displayed on the VR headset's display area for 1000ms, followed by a stimulus image consisting of a box and a line segment inside the box, which is presented for 2000ms. The test subject judges whether the line is perpendicular to the edge of the box and responds by pressing a button until the set number of tests is completed. The test task ends, and the error rate ER_B is obtained.

[0069]

S04

[0070] The parameters recorded during the high-altitude pain avoidance test and the time-distance regression test include:

[0071] The reaction times under punishment, neutral, and reward conditions are denoted as RT_P, RT_N, and RT_I, respectively. In each trial, the VR headset display shows stimulus cues (punishment, neutral, and reward). The time interval from the fixation point to the subject pressing the reaction button is the subject's reaction time. The subject's reaction time under each stimulus condition is obtained. After the task is completed, the reaction times under the three stimulus conditions are calculated separately, and then the average values ​​are obtained, which are RT_P (average reaction time under punishment condition), RT_N (average reaction time under neutral condition), and RT_I (average reaction time under reward condition).

[0072] The proportion of invalid trials, denoted as invalid_P, is calculated as: number of invalid trials / total number of trials. If the subject's key press response time is less than 50ms after the fixation point is presented, or if no key is pressed before the fixation point disappears, the trial is judged as invalid.

[0073] The eye-closing rate, denoted as null_P, is calculated as: eye-closing time / total task time.

[0074] Invalid fixation, denoted as invalid_fixation, is calculated as: total fixation time in the upper half of the visual field / total task time;

[0075] Time Distance Deviation II, denoted as TPI_AID, requires the test subject to estimate the time taken for the high-altitude avoidance test task that has just been completed (accurate to the second). The experimenter inputs the estimate into the computer. The calculation method for Time Distance Deviation II is: actual time taken for the high-altitude pain avoidance test / test subject's post-test estimate of the time taken for this part.

[0076] This invention uses high-intensity stimulation as a reward (reduction) and punishment (increase). While adapting to a virtual high-altitude scenario, it uses high-intensity stimulation to induce positive and negative emotional responses in the test subjects, examines the motivation level of depressed patients to avoid pain, and obtains response times under punishment, neutral and reward conditions, which can be used as one of the bases for assessing pain avoidance.

[0077] The specific procedure for the high-altitude pain avoidance test is as follows: Figure 5 As shown:

[0078] The computer transmits the high-altitude pain avoidance test task to the VR headset, presenting experimental stimuli on the headset's display area. At the start of each trial, a cue of any condition (punishment, neutral, or reward) is randomly presented in the center of the display area for 500ms. Next, a fixation point is presented in the center of the display area for 2000–2500ms. The participant must react quickly by pressing a button the moment they see the fixation point. In trials presenting the punishment cue, if the participant successfully presses the button, the virtual height remains unchanged; otherwise, the height increases. In trials presenting the reward cue, if the participant successfully presses the button, the height decreases; otherwise, the height remains unchanged. In trials presenting the neutral cue, the height remains unchanged regardless of whether the participant successfully presses the button.

[0079] The task ends when the number of trials exceeds the set value, and the average reaction time under the three stimulus conditions is calculated.

[0080] The assessment criteria for subject distress avoidance established in this invention include the following relationships:

[0081] RT_P < (RT_N + RT_I) / 2;

[0082] Invalid_P > 0.3;

[0083] null_P+invalid_fixation>0.7;

[0084] If at least one of the above criteria for pain avoidance assessment is met, the test subject has a high pain avoidance tendency; otherwise, they have a low pain avoidance tendency.

[0085]

S05

S03

[0086] The recorded physiological data II included: acceleration, skin conductance, and heart rate, denoted as pose_H, SCL_pose, and HR_pose, respectively, and the time deviation III was denoted as TPI_pose.

[0087] An example of the body balance test procedure is as follows:

[0088] ① The subject closes their eyes, stands with their arms crossed, and performs the test for 2 minutes each time, for a total of 3 tests;

[0089] ② The subject closes their eyes, crosses their arms, and stands with the toes of one foot touching the heel of the other foot. Each session lasts 2 minutes, and 3 sessions are performed.

[0090] ③ After each test, time interval retrospection is performed, and the test subject is asked to estimate the time when they just stood up. The TPI_pose is calculated as: actual time taken for the body balance test / test subject's estimated time for this step.

[0091]

S06

[0092]

S07

S05

S06

[0093] The criteria for establishing an assessment of acrophobia include the following relationships:

[0094] pose_H>pose_B; ER_H>ER_B;

[0095] (TPI_AID+TPI_pose+TPI_FBT) / 3>TPI_B;

[0096] (SCL_pose+SCL_FBT) / 2>SCL_B; (HR_pose+HR_FBT) / 2>HR_B;

[0097] If at least three of the above criteria for assessing acrophobia are met, the subject has a strong acrophobia; otherwise, they have a weak acrophobia.

[0098]

S08

[0099] The method for assessing the risk of suicidal ideation in test subjects is as follows:

[0100] If a low pain avoidance tendency (L_PA) and a strong acrophobia response (H_Acr) are present, the risk level of suicidal ideation is assessed as Level 1.

[0101] If there is a high pain avoidance tendency (H_PA) and a strong acrophobia response (H_Acr), the risk level of suicidal ideation is assessed as level two.

[0102] If a low pain avoidance tendency (L_PA) and a weak acrophobia response (L_Acr) are present, the risk level of suicidal ideation is assessed as level two.

[0103] If a high pain avoidance tendency (H_PA) and a weak acrophobia response (L_Acr) are present, the risk level of suicidal ideation is assessed as level three.

[0104] Furthermore, the higher the risk level of suicidal ideation, the greater the risk.

[0105] This invention uses "pain avoidance" as the core basis for predicting and assessing suicidal ideation, employing objective evaluation methods and multiple physiological and psychological indicators to assess depressed patients. Simultaneously, this invention uses high-intensity stimulation as a reward (reduction) and punishment (increase), adapting to a virtual high-altitude scenario while inducing positive and negative emotional responses in the subjects to examine the level of motivation for pain avoidance in depressed patients.

[0106] This invention utilizes a high-altitude virtual scenario to make the assessment purpose more covert. By analyzing the reaction time, eye movement patterns, motor performance, time distance perception, and objective indicators such as skin conductance and heart rate of depressed patients during task performance in a high-altitude scenario, a more realistic observation of the patients' reactions can be made, allowing for a more accurate assessment of their internal state. Furthermore, using high-altitude stimulation to test pain avoidance motivation can, while inducing both positive and negative emotional states in the subjects, to some extent protect them from triggering their unique traumatic experiences.

[0107] In this invention, the final assessment of suicidal ideation requires a comprehensive consideration of pain avoidance tendency and acrophobia, resulting in the following three risk levels, as described in detail below:

[0108] When H_PA and L_Acr appear simultaneously, it indicates that although there is no strong fear of heights, there is still a high tendency to avoid pain, indicating that the tendency to avoid pain is higher than normal, and therefore the risk is higher, which is defined as risk level 3.

[0109] When H_PA and H_Acr appear simultaneously, it indicates that the test subject is likely to exhibit both a high avoidance tendency and a strong fear of heights. The degree of avoidance of pain is relatively normal, and therefore it is defined as "risk level 2".

[0110] When L_PA and L_Acr appear simultaneously, it indicates that the patient may have a high tolerance threshold for heights. This test did not effectively induce a fear of heights, and there was no avoidance of pain. However, the possibility of high risk cannot be ruled out. Further observation and evaluation are required, and it is classified as risk level 2.

[0111] When L_PA and H_Acr appear simultaneously, it indicates that even though the test subject has a strong fear of heights, they still do not show a high tendency to avoid pain, and this is classified as risk level 1.

[0112] like Figure 2 As shown, this invention also provides a system for assessing the risk of suicidal ideation in depressed patients based on a high-altitude virtual scene, comprising: a VR headset, physiological monitoring equipment, eye-tracking glasses, a computer, and a reaction keyboard (or controller). The computer includes a data processing module, a pain avoidance assessment module, a fear of heights assessment module, and a suicidal ideation risk assessment module. The VR headset is a commercially available device capable of data communication with the computer. It is worn on the subject's head and used to present virtual high-altitude scene tasks. The high-altitude scene tasks can be transmitted and updated via the computer and presented sequentially on the VR headset according to the task execution program. The presented VR high-altitude virtual scene is described as follows:

[0113] ①The scenario is located in a residential area with high-rise buildings in the city. The test subject is standing at the foot of a building, and there is a tall building on the opposite side as a height reference. As the test subject's height changes, the reference building displays a numerical height prompt.

[0114] ② Depending on the task, the physical wooden plank under the test subject is presented in the virtual scene as an outdoor elevator (with transparent walls) or a transparent glass extension platform (with the same shape as the wooden plank).

[0115] ③After the test subject rises to a higher position, there is a basketball court in their field of vision when looking down;

[0116] ④ Based on the real-time heart rate of the test subject, play a heartbeat sound with the same or similar rhythm as the heart rate.

[0117] After wearing the VR headset, the test subject can see the high-altitude scene he is in on the display screen. Of course, the high-altitude scene provided by this invention is not limited to the high-altitude virtual scene form described above.

[0118] The preferred physiological monitoring device is a smart physiological monitoring bracelet worn on the wrist of the test subject to detect physiological data generated during the performance of the task, such as heart rate, acceleration, and skin conductance.

[0119] Eye-tracking glasses are used to collect eye-tracking data from the subject during the task and transmit it to the computer. The data processing module records and calculates the subject's physiological data, eye-tracking data, and test data. The test data includes data from behavioral avoidance tests, high-altitude distress avoidance tests, time-distance regression tests, and frame bar tests. Specifically, the procedures for the high-altitude distress avoidance test and the frame bar test are as follows: Figure 3 and Figure 4 As shown.

[0120] The pain avoidance assessment module evaluates the level of avoidance tendency of test subjects based on physiological data, eye movement data, and time distance deviation obtained by the data processing module when the subject performs the high-altitude pain avoidance test and time distance regression test. For example, in a virtual high-altitude scenario, the subject is raised to a set height (e.g., 3m) and performs the high-altitude pain avoidance test and time distance regression test at this height. The data is recorded in the data processing module, and the pain avoidance assessment module makes an evaluation. Of course, different virtual high-altitude scenario heights can be set for different test subjects and can be configured on a computer.

[0121] The acrophobia assessment module evaluates the strength of the subject's acrophobia response based on physiological data, time distance deviation I, time distance deviation II, and time distance deviation III obtained from the data processing module when the subject ascends to the highest position in the virtual high-altitude scene (e.g., to the maximum tolerable height limit H_MAX). The subject performs a balance test and a time distance regression test at this height, and the data is recorded in the data processing module. The acrophobia assessment module then performs the evaluation; the specific calculation and evaluation methods have been described above and will not be repeated here.

[0122] The suicidal ideation risk assessment module, combined with the pain avoidance assessment module and the acrophobia response assessment module, assesses the risk of the test subject and makes a risk level assessment of the test subject's suicidal ideation risk. This invention provides three levels of risk under four risk situations. By using a VR headset combined with high-altitude "pain avoidance", the risk of the depression patient's own ideation is assessed. The assessment purpose is clear, the test subject can objectively show the tendency intention, and the risk assessment accuracy of the depression patient is higher.

[0123] Any aspects not covered in this invention are applicable to existing technologies.

[0124] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A method for assessing the risk of suicidal ideation in depressed patients based on a high-altitude virtual scene, characterized in that, The method includes the following steps: Step 1: The subject wears a VR headset, physiological monitoring equipment, and eye-tracking glasses to record physiological data I of the subject in a resting upright state; Step 2: The subject performs a time interval retrospective test in a calm state, and the time interval deviation I is recorded; Step 3: Control the VR headset to present the "ground" scene, perform a frame test, and record the error rate ER_B; Step 4: Adjust the VR headset to present a high-altitude scene, raise the test subject to the set height, and conduct a high-altitude pain avoidance test and a time-distance regression test to establish a basis for the test subject's pain avoidance assessment. Step 5: Adjust the VR headset to present a high-altitude scene, allowing the subject to continue rising to the highest point, and conduct a body balance test and a time distance retrospective test, recording physiological data II and time distance deviation III; Step 6: Keep the subject at the highest point of the high-altitude scene, perform the frame-and-bar test and the time interval retrospective test, and record the physiological data III, time interval deviation IV, and error rate ER_H; Step 7: Establish the assessment criteria for the subject's fear of heights based on Steps 5 and 6; Step 8: Based on the pain avoidance assessment criteria and the acrophobia response assessment criteria, assess the risk level of the test subject's suicidal ideation risk. In step 4, the recorded parameters obtained during the high-altitude pain avoidance test and the time interval retrospective test include: The response times presented under punishment, neutral, and reward stimuli during the high-altitude pain avoidance test were denoted as RT_P, RT_N, and RT_I, respectively. The proportion of invalid trials is denoted as invalid_P; The rate of eye closure, denoted as null_P; Invalid fixations are denoted as invalid_fixation. Time difference deviation II, denoted as TPI_AID; In step 4, the basis for establishing the assessment of the subject's distress avoidance includes the following relationship: RT_P < (RT_N + RT_I) / 2; Invalid_P > 0.3; null_P+invalid_fixation>0.7; If at least one of the above criteria for pain avoidance assessment is met, the test subject has a high pain avoidance tendency; otherwise, the test subject has a low pain avoidance tendency. The time interval deviation I in steps 1 and 2 is denoted as TPI_B. The recorded physiological data I include: acceleration, skin conductance and heart rate, denoted as pose_B, SCL_B and HR_B, respectively. The time deviation III in step 5 is denoted as TPI_pose, and the recorded physiological data II includes: acceleration, skin conductance and heart rate, denoted as pose_H, SCL_pose and HR_pose, respectively. The time interval deviation IV in step 6 is denoted as TPI_FBT, and the recorded physiological data III includes: skin conductance and heart rate, denoted as SCL_FBT and HR_FBT, respectively; In step 7, the criteria for assessing acrophobia include the following relationship: pose_H>pose_B; ER_H>ER_B; (TPI_AID+TPI_pose+TPI_FBT) / 3>TPI_B; (SCL_pose+SCL_FBT) / 2>SCL_B; (HR_pose+HR_FBT) / 2>HR_B; If at least three of the above criteria for assessing acrophobia are met, the subject has a strong acrophobia; otherwise, they have a weak acrophobia.

2. The method for assessing the risk of suicidal ideation in depressed patients based on a high-altitude virtual scene according to claim 1, characterized in that, Step 3 further includes first adjusting the high-altitude scene presented by the VR headset, conducting a behavioral avoidance test on the test subject to obtain the height limit H_MAX that the test subject can withstand, and then lowering the test subject to the "ground" scene; Step 5 involves raising the test subject to the height limit H_MAX.

3. The method for assessing the risk of suicidal ideation in depressed patients based on a high-altitude virtual scene according to claim 1, characterized in that, The method for assessing the risk level of suicidal ideation in step 8 is as follows: If there is a tendency to avoid pain and a strong fear of heights, the risk level of suicidal ideation is assessed as Level 1. If there is a high tendency to avoid pain and a strong fear of heights, the risk level of suicidal ideation is assessed as level two. If there is a low tendency to avoid pain and a weak fear of heights, the risk level of suicidal ideation is assessed as level two. If there is a high tendency to avoid pain and a weak fear of heights, the risk level of suicidal ideation is assessed as level three. Furthermore, the higher the risk level of suicidal ideation, the greater the risk.

4. A system for assessing the risk of suicidal ideation in depressed patients based on a high-altitude virtual scene, characterized in that, The system includes: a VR headset, worn on the head of the test subject, used to present virtual high-altitude scene tasks; Physiological monitoring equipment is used to detect physiological data generated during the performance of tasks; Eye-tracking glasses are used to collect eye-tracking data from test subjects during task execution. The data processing module is used to record and calculate the physiological data, eye movement data and test data of the test subjects. The test data includes test data generated from performing behavioral avoidance tests, high-altitude pain avoidance tests, time interval regression tests and frame bar tests. A reaction keyboard is used to perform key presses during the high-altitude pain avoidance test and the frame bar test. The pain avoidance assessment module assesses the level of the subject's avoidance tendency based on the physiological data, eye movement data, and time distance deviation obtained by the data processing module when the subject rises to a set height in the virtual high-altitude scene. The acrophobia assessment module evaluates the strength of the subject's acrophobia response based on the physiological data, time distance deviation I, time distance deviation II, and time distance deviation III obtained by the data processing module when the subject ascends to the highest position in the virtual high-altitude scene. The suicidal ideation risk assessment module assesses the risk level of the test subject's suicidal ideation risk based on the aforementioned pain avoidance assessment module and acrophobia response assessment module. In step 4, the recorded parameters obtained during the high-altitude pain avoidance test and the time interval retrospective test include: The response times presented under punishment, neutral, and reward stimuli during the high-altitude pain avoidance test were denoted as RT_P, RT_N, and RT_I, respectively. The proportion of invalid trials is denoted as invalid_P; The rate of eye closure, denoted as null_P; Invalid fixations are denoted as invalid_fixation. Time difference deviation II, denoted as TPI_AID; In step 4, the basis for establishing the assessment of the subject's distress avoidance includes the following relationship: RT_P < (RT_N + RT_I) / 2; Invalid_P > 0.3; null_P+invalid_fixation>0.7; If at least one of the above criteria for pain avoidance assessment is met, the test subject has a high pain avoidance tendency; otherwise, the test subject has a low pain avoidance tendency. The time interval deviation I in steps 1 and 2 is denoted as TPI_B. The recorded physiological data I include: acceleration, skin conductance and heart rate, denoted as pose_B, SCL_B and HR_B, respectively. The time deviation III in step 5 is denoted as TPI_pose, and the recorded physiological data II includes: acceleration, skin conductance and heart rate, denoted as pose_H, SCL_pose and HR_pose, respectively. The time interval deviation IV in step 6 is denoted as TPI_FBT, and the recorded physiological data III includes: skin conductance and heart rate, denoted as SCL_FBT and HR_FBT, respectively; In step 7, the criteria for assessing acrophobia include the following relationship: pose_H>pose_B; ER_H>ER_B; (TPI_AID+TPI_pose+TPI_FBT) / 3>TPI_B; (SCL_pose+SCL_FBT) / 2>SCL_B; (HR_pose+HR_FBT) / 2>HR_B; If at least three of the above criteria for assessing acrophobia are met, the subject has a strong acrophobia; otherwise, they have a weak acrophobia.

5. The system for assessing the risk of suicidal ideation in depressed patients based on a high-altitude virtual scene according to claim 4, characterized in that, The physiological monitoring device is a smart physiological monitoring bracelet worn on the wrist of the subject.

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