Driver psychophysiological state detection
It is herein disclosed a method of collecting data for determining a psychophysiological state of a human driver, comprising collecting data throughout a driving session in a car simulator, wherein the driving session comprises a plurality of driving stages, wherein the plurality of driving stages comprise, at least: a first stage of driving by a driver in a first scenario; a second stage of driving by the driver in a first scenario, wherein a first cognitive test is performed by the driver simultaneously with the driving; a third stage of driving by the driver in a second scenario; a fourth stage of driving by the driver in the second scenario, wherein a second cognitive test is performed by the driver simultaneously with the driving; wherein said collecting data comprises: collecting, by a plurality of detection means, physiological data on the driver throughout the driving session; wherein the physiological data collected comprises at least one of: heart rate data, electroencephalogram (EEG) data, eye movement data, and respiration data; and collecting driver behaviour data.
1 . A method of collecting data for determining a psychophysiological state of a human driver, comprising:
performing a driving session of a driver in a car simulator, wherein the driving session comprises:
a plurality of driving stages, the plurality of driving stages comprising:
a first stage of driving in a first scenario;
a second stage of driving in the first scenario, wherein the driver undergoes a first cognitive test simultaneously with the driving;
a third stage of driving in a second scenario; and
a fourth stage of driving in the second scenario, wherein the driver undergoes a second cognitive test simultaneously with the driving;
wherein the first scenario simulates a driving scenario of a first level of complexity,
wherein the second scenario simulates a driving scenario of a second level of complexity higher than the first level of complexity, and
wherein each of the first and second cognitive tests is an N-back test;
the method further comprising:
collecting, throughout the driving session, physiological data on the driver and driver behavior data, wherein the physiological data comprises at least one of: heart rate data, electroencephalogram (EEG) data, eye movement data, and respiration data, and wherein the driver behavior data is indicative of a steering wheel activity of the driver and a reaction of the driver to the cognitive tests.
2 . The method in accordance with claim 1 , wherein the plurality of driving stages further comprises:
a fifth stage of driving by the driver in the first scenario, wherein a third cognitive test is performed by the driver simultaneously with the driving; and
a sixth stage of driving by the driver in the second scenario, where fourth and fifth cognitive tests are performed by the driver simultaneously with the driving;
wherein each of the third and fifth cognitive tests are detection response tasks (DRTs), and wherein the fourth cognitive test is an N-back test.
3 . The method in accordance with claim 2 , wherein each DRT comprises the driver reacting to the at least one visual stimulus, and wherein said recording the driver's reaction comprises at least one of: recording a response time of the user in reaction to the visual stimulus, a number of correct responses, and a number of incorrect responses in each DRT.
4 . The method in accordance with claim 3 , wherein in each DRT the driver reacts to the at least one visual stimulus by physically pressing a button in the car simulator.
5 . The method in accordance with claim 3 , wherein in at least one of the DRTs, at least one false stimulus is provided to the driver that the driver is instructed to ignore; wherein, the visual stimulus comprises a visual indication in a first color, and the false stimulus comprises a visual indication in a second color different from the first color.
6 . The method in accordance with claim 1 , wherein in each N-back test the driver reacts by physically pressing a button in the car simulator.
7 . The method in accordance with claim 1 , wherein each of the plurality of driving stages has a time duration of between 4 and 6 minutes.
8 . The method in accordance with claim 1 , wherein the driving session takes place after a first period of rest by the driver for a first predetermined duration, and a second period of rest by the driver for a second predetermined duration takes place after the driving session.
9 . The method in accordance with claim 8 , further comprising:
collecting self-reported data from the driver before, during and after the driving session, the self-reported data comprising data on at least one of: the driver's psychological state, physical state and prior sleep conditions.
10 . The method in accordance with claim 9 , wherein collecting self-reported data comprises:
collecting first self-reported data before the first period of rest;
collecting second self-reported data after each of the plurality of driving stages during the driving session;
collecting third self-reported data after the second period of rest.
11 . The method in accordance with claim 1 , wherein the physiological data on the driver and the driver behavior data is collected via a plurality of detection means, and wherein the plurality of detection means comprises at least one of: ECG apparatus for obtaining heart rate data, EEG apparatus for obtaining EEG data, at least one eye-tracking camera for obtaining eye movement data, at least one camera for obtaining video data of the driver's face, and at least one photoplethysmography sensor to collect blood circulation data.
12 . The method in accordance with claim 9 , further comprising:
analyzing the physiological data and the driver behavior data to determine a psychophysiological state of the driver during the driving session.
13 . The method in accordance with claim 12 , wherein analyzing the physiological data and driver behavior data comprises storing the collected data in a memory and/or sending the collected data to a processor for analysis.
14 . The method in accordance with claim 12 , further comprising storing results of the analysis and the collected physiological data and the collected driving behavior data in a database, and using the database as training data for a machine-learning algorithm to predict or estimate the psychological state of a driver when driving.
15 . A system for collecting data for determining a psychophysiological state of a human driver, comprising:
means for collecting data throughout a driving session of a driver in a car simulator, wherein the driving session comprises:
a first stage of driving in a first scenario;
a second stage of driving in the first scenario, wherein the driver undergoes a first cognitive test simultaneously with the driving;
a third stage of driving in a second scenario; and
a fourth stage of driving in the second scenario, wherein the driver undergoes a second cognitive test simultaneously with the driving;
wherein the first scenario simulates a driving scenario of a first level of complexity,
wherein the second scenario simulates a driving scenario of a second level of complexity higher than the first level of complexity,
wherein each of the first and second cognitive tests is an N-back test, and
wherein the means for collecting data comprises:
a plurality of detection means for collecting physiological data on the driver and driver behavior data throughout the driving session; wherein the physiological data collected comprises at least one of: heart rate data, electroencephalogram (EEG) data, eye movement data, and respiration data, and wherein the driver behavior data is indicative of a steering wheel activity of the driver and a reaction of the driver to the cognitive tests.