CN115814231A - Virtual-real combination device for inducing psychological stress and multi-mode evaluation method - Google Patents
Virtual-real combination device for inducing psychological stress and multi-mode evaluation method Download PDFInfo
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Abstract
The invention discloses a virtual-real combination device and a multi-mode evaluation method for inducing psychological stress, which comprise a VR helmet, a cabin body, an entity balance beam which is positioned in the cabin body and is used for being tried to walk, and a control display screen positioned outside the cabin body, wherein the entity balance beam is arranged in the middle of the cabin body through an elastic support body, pressure patch sensors are distributed on the entity balance beam, a laser displacement sensor is arranged at the far end of the entity balance beam, the laser displacement sensor, the pressure patch sensors and the VR helmet are respectively connected with the control display screen, the VR helmet presents a virtual balance beam with the same proportion as the entity balance beam in a test task, and real-time position information and jitter data on the entity balance beam are consistent with the presented virtual balance beam; the cabin body is also internally provided with a camera, and the tested test process state is displayed in a video mode on the control display screen. And inducing the psychological stress of the testee in a multi-mode by adopting a virtual-real combination mode, and rapidly evaluating the psychological stress degree of the testee according to the established comprehensive recognition algorithm model.
Description
Technical Field
The invention belongs to the technical field of psychological stress induction, and particularly relates to a deficiency and excess combination device for inducing psychological stress and a multi-mode evaluation method.
Background
Psychological stress is induced in a number of ways, such as simulated interviews, painful stimuli, white noise stimuli, difficult cognitive tasks plus negative feedback, watching negative movie fragments, VR simulating fire or high altitude, etc. There are some classic paradigms of Stress induction commonly used in the laboratory in psychology, such as Trier Social Stress Test (TSST) and cold Stress (CPS). The trier social stress test generally comprises three stages of preparation, performance by the public, and mental arithmetic by the public. The TSST stress test has been widely used abroad, has become the gold standard for the induction of psychosocial stress in laboratories, and is capable of inducing a more pronounced cortisol response than the cold stress test. In these traditional paradigms, the used human scenes inducing stress are mostly presented directly to the participants by the experimental main trials, and it is difficult to ensure that the presented scenes and the presentation of the main trials are consistent among different participants in the experimental process. Furthermore, the means of inducing stress applied by the TSST paradigm, including speech, mental calculations, etc., require a pilot of sufficient size to maximize the stress response of the participants, and require training of the pilot in advance, requiring a tremendous amount of labor and time.
In recent years, virtual Reality (VR) technology is applied to this field, and a VR scene can induce stress response of participants by creating a stress-inducing task, so that the VR scene has the advantages of being capable of replacing a main test for social evaluation of the participants with a Virtual character, saving labor and time, and keeping consistency for all participants in an experimental process. However, it should be noted that VR can only create an environment similar to real-world scenes, and also needs to incorporate real-world operations to increase realism and immersion of participants. For example, a room with a damaged inner floor of an inner room of a high-rise building is simulated by adopting a VR (virtual reality) technology, a scene below the building can be seen from a large-area broken hole, a participant is required to overcome the problem that articles in a handle are placed at a specified position (the participant needs to walk through the broken hole) by a high psychological degree, and the result shows that the scene can effectively cause the stress response of the participant. However, in the research, a participant only enters a room of a VR scene, walks to a specified position and puts down articles, even though the task is completed, the operation and the design are too simple, and the difficulty is far different from the stress scene encountered in the actual life and the difficulty of corresponding operation required to be performed. There are also studies to create a similar virtual room, but the actions needed to be done by the participants after entering the room, such as turning around, or even rolling over, are increased, but the participants in the study cannot feel the action matched with the scene, so the stress effect is reduced.
Disclosure of Invention
In order to solve the technical problems, a device combining a virtual scene and an actual scene is adopted to induce the psychological stress of a tested subject in a multi-mode, the physiological data change generated in the testing process of the tested subject is accurately measured, the expression, the limb reaction and the self-evaluation condition in the testing process are combined, and the psychological stress degree of the tested subject is rapidly evaluated according to the established comprehensive recognition algorithm model ， Therefore, the invention provides a virtual-real combination device and a multi-mode evaluation method for inducing psychological stress.
The adopted technical scheme is as follows:
in one aspect, the invention provides a virtual-real combination device for inducing psychological stress, the virtual-real combination device comprises a VR helmet, a cabin, a physical balance beam for trial walking located in the cabin, and an operation display screen located outside the cabin, the physical balance beam is mounted inside the cabin through an elastic support, a plurality of pressure patch sensors are distributed on the physical balance beam, a laser displacement sensor for recording the shake and inclination degree of the physical balance beam is mounted at the far end of the physical balance beam, the laser displacement sensor, the pressure patch sensor and the VR helmet are respectively connected with the operation display screen, the VR helmet presents a virtual balance beam in equal proportion to the physical balance beam in a test task, and real-time position information and shake data on the physical balance beam are consistent with the presented virtual balance beam; still be equipped with the camera that is used for shooing the face and the behavioral state of being examined in the cabin body, the camera with control the display screen and be connected, the test process state of will being examined is in control the video presentation on the display screen.
Further, the top of the cabin body is also provided with a sliding rod which is arranged in parallel with the entity balance beam, the sliding rod is provided with a safety belt which slides along the sliding rod, and the safety belt is connected with the sliding rod through a lock catch.
Further, the virtual balance beam presented on the VR headset is located in the presented virtual high-rise scene and is a suspended plate extending outside the building.
Furthermore, fans used for simulating high-altitude wind power are respectively arranged at the two sides of the cabin body, and wind sounds are simulated and played through the microphone on the VR helmet.
Preferably, the elastic supporting body is a supporting spring which is respectively arranged at 1/3 and 2/3 length positions of the bottom end of the solid balance beam.
Furthermore, a test task library is stored in the control display screen, and a main test is performed by calling the test tasks in the test task library and transmitting the called test tasks to the VR helmet for presentation.
On the other hand, the invention also provides a multi-mode evaluation method for inducing psychological stress, which adopts the virtual-real combination device for evaluation, and the specific evaluation method comprises the following steps:
a physiological acquisition bracelet is worn by a subject to acquire heart rate and skin electric data Q1 in a calm state and saliva cortisol data P1 at the same time;
the main test personnel opens the test task by controlling the display screen, the virtual reality scene is displayed, and the cabin scene and the virtual reality scene are synchronized;
a tested VR helmet is worn to open the cabin door to enter the cabin body, an appointed task is completed according to an instruction in the test task, and tested heart rate and skin electricity data Q2 are collected in the whole process;
after the testing task is completed, collecting tested salivary cortisol data P2, actively reporting the current psychological stress degree by the tested saliva, and selecting a specific score capable of reflecting the current situation to obtain a self-rating score;
the main test observes the facial expression and the limb reaction of the tested person by controlling a display screen, judges the stress degree of the tested person and obtains the evaluation score of the person;
the tested object is taken out from the cabin body, and salivary cortisol data P3 and heart rate and skin electricity data Q3 which are obtained by recovering the tested object to be in a calm state are collected;
and establishing a comprehensive recognition algorithm model, and evaluating the psychological stress degree of the tested object by using the obtained self-evaluation score and the obtained other evaluation score and the salivary cortisol data, the heart rate data or the skin electric data which are respectively obtained by the front test, the middle test and the back test.
The established comprehensive identification algorithm model comprises a mild psychological stress identification algorithm model, a moderate psychological stress identification algorithm model and a severe psychological stress identification algorithm model;
the severe psychological stress recognition algorithm model simultaneously meets the following conditions:
(1) the psychological stress scores the other, the score reaches 8-10 points, and the degree is severe;
(2) the psychological stress self-scoring scores, the score is 5-6, and the psychological stress self-scoring scores are expressed as very fear;
(3) in the salivary cortisol data P1, P2 and P3, the change rate of P2 is more than 50% compared with the mean value of P1+ P2;
(4) in at least one parameter in the two data of the heart rate and the skin electricity, compared with the mean value of Q1 and Q3, the change rate of Q2 exceeds more than 50 percent;
the mild psychological stress recognition algorithm model simultaneously meets the following conditions:
(1) the psychological stress scores from 0 to 3 points, which is expressed as mild degree;
(2) the psychological stress self-scoring is carried out, the score is 0-1, and the slight fear is shown;
(3) in the salivary cortisol data P1, P2 and P3, the change rate of P2 is lower than 20% compared with the mean value of P1+ P2;
(4) in at least one parameter in the heart rate data and the skin electricity data, the change rate of Q2 is lower than 20% compared with the mean value of Q1 and Q3;
the moderate psychological stress recognition algorithm model is a tested object which does not accord with the mild or severe psychological stress recognition algorithm model, and the degree of the moderate psychological stress is evaluated.
The technical scheme of the invention has the following advantages:
A. the invention installs the solid balance beam, the camera, the control display screen and the VR helmet for the trial wearing in the built cabin body, the trial presents the virtual balance beam and the high-altitude virtual scene which are the same as the solid balance beam in the cabin by wearing the VR helmet, the left-right swing state and the inclination angle generated by the trial stepping on the solid balance beam are completely synchronous with the virtual balance beam presented to the trial, the corresponding test task is executed in the presented virtual scene, the camera monitors other evaluation scores obtained by the change of the tested form, self-evaluation scores obtained by self perception and salivary cortisol data, heart rate or bioelectricity data obtained before, during and after testing, a comprehensive evaluation method is adopted to obtain the psychological stress degree of the tested object, the evaluation accuracy is higher, meanwhile, the tested object can feel a virtual scene and the actual operation and the proper feeling of the tested object are combined to better induce the stress response of participants.
B. According to the invention, through the established virtual reality scene and the entity cabin body, various modal evaluation can be realized, test tasks with different difficulties can be obtained by changing the inclination angle of the entity balance beam in the cabin body, and wind power in a virtual environment can be simulated through the microphone and the fan in the cabin body, so that psychological stress to be tested can be induced more truly. The heart rate, the bioelectricity and the salivary cortisol data collected before, during and after the measurement are combined, wherein the salivary cortisol data are more sensitive and higher in effectiveness compared with the heart rate and the bioelectricity, and the combination of the three collection indexes is more convenient for accurately distinguishing three different levels of mild psychological stress degree, moderate psychological stress degree and severe psychological stress degree.
Drawings
In order to more clearly illustrate the embodiments of the present invention, the drawings which are needed to be used in the embodiments will be briefly described below, and it is apparent that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained from the drawings without inventive labor to those skilled in the art.
FIG. 1 is a perspective view of the internal structure of the virtual-real combining device provided by the present invention;
FIG. 2 is a schematic view of another angular structure provided by the present invention;
fig. 3 is a block diagram illustrating the relationship between the devices of the virtual-real combining apparatus provided in the present invention.
The labels in the figure are as follows:
1-VR helmets; 2-cabin body, 21-cabin door; 3-entity balance beam; 4-operating the display screen; 5-an elastic support; 6-a camera; 7-a slide bar; 8-locking; 9-a fan; 10-test; and (20) pedaling.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, fig. 2 and fig. 3, the present invention provides a virtual-real combination device for inducing psychological stress, comprising a wearable VR helmet 1, a cabin 2, a physical balance beam 3 located inside the cabin 2 for a subject 10 to walk, and a control display screen 4 located outside the cabin 2, wherein the physical balance beam 3 is mounted at the middle part of the cabin 2 through an elastic support 5, wherein the elastic support 5 is preferably a support spring, and is preferably mounted at 1/3 and 2/3 length positions of the physical balance beam 3; meanwhile, a plurality of pressure patch sensors (not shown in the figure) are distributed on the entity balance beam 3, a laser displacement sensor used for recording the shaking and inclination degree of the entity balance beam 3 is installed at the far end of the entity balance beam 3, the laser displacement sensor, the pressure patch sensors and the VR helmet 1 are respectively connected with the control display screen 4, the VR helmet 1 presents a virtual balance beam in proportion to the entity balance beam 3 in a test task, and real-time position information and shaking data on the entity balance beam 3 are consistent with the presented virtual balance beam; still be equipped with the camera 6 that is used for shooing the face and the behavior state of being examined in cabin body 2, camera 6 with control display screen 4 and be connected, the test state that will be examined video presentation on controlling display screen 4. When the tested object is tested, the VR helmet is worn firstly, a test task is called, then the cabin door 21 is opened by a main tester, a virtual balance beam high-altitude scene extending out of a high building can be displayed in a window of the VR helmet, and the test is completed according to a test task instruction.
In order to ensure the safety of the tested person walking on the solid balance beam in the cabin, the top of the cabin body 1 is also provided with a sliding rod 7 which is arranged in parallel with the solid balance beam 3, the sliding rod 7 is provided with a safety belt which slides along the sliding rod 7, the safety belt is connected with the sliding rod 7 through a lock catch 8, the safety belt can move along with the movement of the tested person, and when the tested person steps on the cabin, accidents such as falling, sprain and the like can be avoided.
The size of the solid balance beam preferably adopted by the invention is as follows: 4000mm (length) 250mm (width) 40mm (thickness), its lower terminal surface is 400mm apart from the ground height, has installed a pedal 20 before getting into the hatch door, through the pedal 20 reach the entity balance beam on, because the entity balance beam is movable plank structure, can control its inclination and can carry out the rotation of setting for the angle through the motor, form different test difficulties.
Certainly, when the pressure patch sensors are arranged on the surface of the solid balance wood in the cabin body, the position information of the physical balance wood, which is tested to walk on, can be recorded in real time, meanwhile, the wood board shaking and inclining degree of the physical balance wood, which is tested to walk on, is recorded through the laser displacement sensor, the recorded position information and shaking and inclining information are transmitted to the control display screen, and the control display screen is transmitted to the VR helmet. Because the physical balance beam and the VR helmet are constructed in equal proportion in the virtual reality scene to be tested, the upper spring and the lower spring cause the vertical shaking and the horizontal shaking during walking of the test, and the induction of psychological stress is enhanced. The tested person can see the walking position on the virtual balance beam through the presented virtual balance beam, and the position is also the actual walking position on the physical balance beam, namely after the virtual VR scene receives the data collected by the sensor, equivalent transformation is carried out on the virtual balance beam, such as inclination of an angle, rotation of 360 degrees and shaking conditions in the process of advancing along with the tested person. In order to further induce the psychological stress of the testee, the virtual balance beam presented by the VR helmet is controlled by the main test, has the functions of 'stretching', 'narrowing and widening', 'gradually transparent' and the like, and is in an overhead position in the virtual scene, so that the stress reaction of the testee is more easily induced.
In order to better simulate the special effect of the virtual balance beam in the high-altitude environment, fans 9 used for simulating high-altitude wind power are respectively arranged above the middle positions of two sides of the cabin body 2, the fans 9 face to be tested, the rotating speed of the fans 9 can be controlled by controlling the display screen through a main test, meanwhile, wind sound can be simulated and played through microphones on the VR helmet 1, namely when the simulated wind speed is high, the fans give out corresponding large rotating speeds. The self-adaptive control and adjustment between the playing wind sound and the rotating speed of the fan can be realized in a PLC linkage mode. The tested visual stimulation is given to the wind power, for example, in a visual field scene presented by a VR helmet, two flying flags are arranged outside a high-rise building and swing back and forth along with the wind direction, so that the immersion and the reality are increased, some fog can be further added in front of the visual field, the feeling of 'cloud mountain fog winding' is achieved, the reality can be increased, and the psychological stress can be induced.
According to the invention, the control display screen 4 is stored with the test task library, and the main test transfers the test tasks in the test task library and transmits the transferred test tasks to the VR helmet 1 for presentation. In a virtual reality scene presented by the VR helmet 1, the tested position information is judged by receiving data recorded by the patch pressure sensor, and different task operations are triggered according to the position information, so that the aims of training and testing psychological stress are fulfilled.
The method comprises the steps of calling a specific task in a test task library by controlling a display screen, requiring a tested cat to complete a large-amplitude action with specific difficulty on a balance beam, and inducing stress, wherein the test task is a cat rescue task, requiring the tested cat on the balance beam to be quickly restored to a room within a limited time, and inducing psychological stress by setting the limited time, the tested cat squat greatly and holding the cat and the like.
Before the test task begins, the cabin door is closed, the VR helmet is worn to be tested, the cabin door is opened after the main test personnel open the test task, the virtual visual scene to be tested and the entity device in the device are completely the same, and the induction reality degree is increased through the double experience of virtual-real combination.
The method for multi-mode evaluation by adopting the provided virtual-real combination device comprises the following steps:
step 1, a physiological collection bracelet is worn by a subject to collect heart rate and skin electric data Q1 in a calm state, and meanwhile, salivary cortisol data P1 are collected;
and 7, establishing a comprehensive recognition algorithm model, and evaluating the psychological stress degree of the tested object by using the obtained self-evaluation score and the self-evaluation score as well as salivary cortisol data, heart rate or skin electric data obtained by the pre-test, the middle test and the post-test respectively.
The established comprehensive identification algorithm model comprises a mild psychological stress identification algorithm model, a moderate psychological stress identification algorithm model and a severe psychological stress identification algorithm model;
the severe psychological stress recognition algorithm model simultaneously meets the following conditions:
(1) the psychological stress scores the other, the score reaches 8-10 points, and the degree is severe;
(2) the psychological stress self-scoring scores, the score is 5 or 6, and the psychological stress self-scoring scores are expressed as very fear;
(3) in the salivary cortisol data P1, P2 and P3, the change rate of P2 is more than 50% compared with the mean value of P1+ P2;
(4) in at least one parameter in the heart rate data and the picoelectricity data, compared with the mean value of Q1 and Q3, the change rate of Q2 exceeds more than 50 percent;
the mild psychological stress recognition algorithm model simultaneously meets the following conditions:
(1) the psychological stress scores from 0 to 3 points, which is expressed as mild degree;
(2) the psychological stress self-scoring scores, the score is 0 or 1, and the mild fear is expressed;
(3) in the salivary cortisol data P1, P2 and P3, the change rate of P2 is lower than 20% compared with the mean value of P1+ P2;
(4) in at least one parameter in the heart rate data and the skin electricity data, the change rate of Q2 is lower than 20% compared with the mean value of Q1 and Q3;
the moderate psychological stress recognition algorithm model is a tested object which does not accord with the mild or severe psychological stress recognition algorithm model, and the degree of the moderate psychological stress is evaluated.
Of course, the scoring data such as the scores given above is only a preferable scheme, and can be adjusted according to actual situations, and details are not described.
According to the invention, the data are collected by combining the heart rate, the skin electricity and the salivary cortisol, wherein the change of the value of the salivary cortisol collected data is more sensitive and more effective than the heart rate and the skin electricity in actual detection. Through the combination of the three acquisition indexes, three different grades of mild psychological stress degree, moderate psychological stress degree and severe psychological stress degree can be distinguished more conveniently and accurately.
Examples
1) Before trying to get into virtual reality combining device, wear VR helmet and portable physiology collection bracelet earlier, sensor data such as physiology collection bracelet record skin electricity, pulse, skin temperature. After wearing the physiological collection bracelet, collecting calm data in a standing state for 3min, and collecting salivary cortisol data of a test;
2) After the collection is finished, a main test person opens a test task by controlling the display screen, the virtual reality scene appears, the cabin body gate is opened, and the actual scene and the virtual scene start to be synchronous. The tested object starts to complete a specified task according to instructions in the virtual reality scene, and simultaneously collects sensor data such as skin electricity, pulse, skin temperature and the like when the test task is completed and tested salivary cortisol data;
3) After the test task is completed, the tested person is required to actively report the current psychological stress degree, the score is 0-6, the score 0 represents very calm without any stress, the score 6 represents very fear, and the stress degree is very high. Requiring the user to select a specific numerical value that reflects the current situation;
4) The main test personnel outside the cabin observe the expression and the body reaction of the user on the control display screen through the camera in the whole process, and judge the stress degree of the user, such as the questionnaire given below:
a. his questionnaire
(1) Shortness of breath (not compliant- > general- > compliant)
(2) More sweating (not conform to- > general- > conform to)
(3) Physical stiffness (not fit- > general- > fit)
(4) Long stay (not conform- > general- > conform)
(5) Pale complexion (not fit- > general- > fit)
b. And (4) scoring by using a likert three-point score, wherein the options are 0,1 and 2, and the score interval is [0,10].
(1) [0-3] indicates the degree of psychological stress, which is expressed as mild;
(2) [4-7] indicates the degree of psychological stress, which is manifested as moderate;
(3) [8-10] indicates the degree of psychological stress, which is manifested as severe.
5) The tested object gets out of the cabin door, sits on the chair again, and collects the 3min watch data and the salivary cortisol data under the restful state;
6) And (3) comprehensive identification algorithm:
a. severe psychological stress, while satisfying the following conditions:
(1) the psychological stress scores are scored, and when the score reaches 8 or more, the degree is severe;
(2) the psychological stress disorder is scored by self, the score is 5 or 6, and the psychological stress disorder is expressed as a very fear;
(3) comparing three values of the forward test, the middle test and the backward test of the salivary cortisol, wherein the change rate of the middle test is more than 50 percent compared with the mean value of the forward test and the backward test;
(4) in the heart rate and the skin electricity data, signals of one or two sensors are compared with three values of front measurement, middle measurement and back measurement,
compared with the mean value of the front measurement and the rear measurement, the change rate of the middle measurement exceeds more than 50 percent;
b. mild psychological stress, while satisfying the following conditions:
(1) the psychological stress score is 0-3, which represents mild behavior;
(2) the psychological stress self-scoring scores, the score is 0 or 1, and the psychological stress self-scoring scores represent slight fear stress;
(3) comparing three values of the forward test, the middle test and the backward test of the salivary cortisol, wherein the change rate of the middle test is lower than 20 percent compared with the mean value of the forward test and the backward test;
(4) in the heart rate or the skin electricity data, signals of one or two sensors are contained, and the change rate of the middle measurement is lower than 20% compared with the mean value of the front measurement and the back measurement when the three values are compared;
c. those that do not meet mild or severe criteria are classified as moderate psychological stress.
Nothing disclosed in this application is applicable to the prior art.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are intended to be within the scope of the invention.
Claims (8)
1. A virtual-real combination device for inducing psychological stress, characterized in that the virtual-real combination device comprises a VR helmet (1), a cabin (2), a physical balance beam (3) located in the cabin (2) and used for being tried to walk, and a control display screen (4) located outside the cabin (2), wherein the physical balance beam (3) is installed inside the cabin (2) through an elastic support body (5), a plurality of pressure patch sensors are distributed on the physical balance beam (3), a laser displacement sensor used for recording the shaking and inclination degree of the physical balance beam (3) is installed at the far end of the physical balance beam (3), the laser displacement sensor, the pressure patch sensors and the VR helmet (1) are respectively connected with the control display screen (4), the VR helmet (1) presents a virtual balance beam with the proportion to the physical balance beam (3) in a test task, and real-time position information and real-time data on the physical balance beam (3) are consistent with the presented virtual balance beam; still be equipped with camera (6) that are used for shooing the face and the behavior state of being examined in cabin body (2), camera (6) with control display screen (4) and be connected, will be tried the test process state and be in control display screen (4) on the video present.
2. The virtual-real combining device for inducing psychological stress according to claim 1, wherein the top of the cabin (1) is further provided with a sliding rod (7) parallel to the solid balance beam (3), the sliding rod (7) is provided with a safety belt sliding along the sliding rod, and the safety belt is connected with the sliding rod (7) through a lock catch (8).
3. The virtual-reality binding apparatus for inducing psychological stress according to claim 1, wherein the virtual balance bar presented on the VR helmet (1) is located in the virtual high-rise scene presented and is a suspended plate extending outside the building.
4. The virtual-real combination apparatus for inducing psychological stress according to claim 1, wherein fans (9) for simulating high altitude wind are respectively disposed at two sides of the cabin (2), and wind sounds are simulated and played through the microphone on the VR helmet (1).
5. The virtual-real combining apparatus for inducing psychological stress according to claim 1, wherein the elastic supporting bodies (5) are supporting springs installed at 1/3 and 2/3 length positions of the bottom end of the solid balance bar (3), respectively.
6. The virtual-reality combining device for inducing psychological stress according to claim 1, wherein the manipulation display screen (4) stores therein a test task library, and the main test is presented by retrieving a test task in the test task library and transmitting the retrieved test task to the VR helmet (1).
7. A multi-modal assessment method for inducing psychological stress, which is characterized in that the assessment method is carried out by using the virtual-real combination device according to any one of claims 1 to 6, and the particular assessment method comprises the following steps:
a physiological acquisition bracelet is worn by a subject to acquire heart rate and skin electric data Q1 in a calm state and saliva cortisol data P1 at the same time;
the main test personnel opens the test task by controlling the display screen, the virtual reality scene is displayed, and the cabin scene and the virtual reality scene are synchronized;
a tested VR helmet is worn to open the cabin door to enter the cabin body, an appointed task is completed according to an instruction in the test task, and tested heart rate and skin electricity data Q2 are collected in the whole process;
after the testing task is completed, collecting tested salivary cortisol data P2, actively reporting the current psychological stress degree by the tested saliva, and selecting a specific score capable of reflecting the current situation to obtain a self-rating score;
the main test observes the facial expression and the limb reaction of the tested person by controlling a display screen, judges the stress degree of the tested person and obtains the evaluation score of the person;
the tested object is taken out from the cabin body, and salivary cortisol data P3 and heart rate and skin electricity data Q3 which are obtained by recovering the tested object to be in a calm state are collected;
and establishing a comprehensive recognition algorithm model, and evaluating the psychological stress degree of the tested object by using the obtained self-evaluation score and the obtained other evaluation score and the salivary cortisol data, the heart rate data or the skin electric data which are respectively obtained by the front test, the middle test and the back test.
8. The multi-modal assessment method according to claim 7, wherein the established comprehensive recognition algorithm model comprises a mild psychological stress recognition algorithm model, a moderate psychological stress recognition algorithm model and a severe psychological stress recognition algorithm model;
the severe psychological stress recognition algorithm model simultaneously meets the following conditions:
(1) the psychological stress score is 8-10;
(2) the psychological stress self-scoring scores, and the score is 5-6;
(3) in the salivary cortisol data P1, P2 and P3, the change rate of P2 is more than 50% compared with the mean value of P1+ P2;
(4) in at least one parameter in the heart rate data and the picoelectricity data, compared with the mean value of Q1 and Q3, the change rate of Q2 exceeds more than 50 percent;
the mild psychological stress recognition algorithm model simultaneously meets the following conditions:
(1) the psychological stress score is 0-3;
(2) the psychological stress self-scoring score is 0-1;
(3) in the salivary cortisol data P1, P2 and P3, the change rate of P2 is lower than 20% compared with the mean value of P1+ P2;
(4) in at least one parameter in the heart rate data and the skin electricity data, the change rate of Q2 is lower than 20% compared with the mean value of Q1 and Q3;
the moderate psychological stress recognition algorithm model is a tested object which does not accord with the mild or severe psychological stress recognition algorithm model, and the degree of the moderate psychological stress is evaluated.
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