Low-cost measuring system for recording driver RT was proposed, where common computer sound card was used for data acquisition. Such method was sufficient to detect response of a driver to hazardous situation. In comparison with data acquisition cards the computer sound card presents a much cheaper solution, especially because you can find it in every PC. It was very useful for research purpose in simulated environment because of easier synchronization of hazard occurrence and driver's response detection. Values of the measured reaction times were comparable to the RT values from previous studies. Evaluation of measuring system was performed by means of driver's immersion and driver's expectancy examination. Answers to the question about hazard expectancy and significant changes of recorded physiological parameters after occurrence of a hazardous situation and reaction of the driver proved that subjects were immersed in driving task and did not expect a hazard, which is similar to the real-world situations. After occurrence of a hazard and after driver's reaction, there was significant change of physiological parameters SC and HR, which proves our first hypothesis. By calculating correlations, it turned out that subjects with larger ΔHR responded quicker, which was our second hypothesis, but it was proved only for ΔHR, while there was no dependence between RT and ΔSC. It was also proved that subjects with larger values SCprior had lower RT, which was our third hypothesis. And again it was only proved for one physiological parameter, while the results of correlation between RT and HRprior showed that drivers with larger HRprior had larger values of RT. Proposed measuring system for recording driver RT is ready to be tested in real-world situation on test ground and public roads. Further study in the field of traffic safety could investigate the effect of driver RT on the behaviour of the vehicle in various conditions. Such research would include measurements of RT and traffic parameters, introducing Event Data Recorder as a measuring device. For better traffic safety examination physiological measurements should be included to study effect of psychophysiological state of the driver on reactions to a various real-world situations. For further studies physiological parameters' sensor set-up should be as unobtrusive as possible. To achieve unobtrusiveness electrodes will be mounted on steering wheel or on seat. Some additional sensors could be employed, such as eye tracker to investigate how driver's point of gaze affects driver RT.


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    Title :

    Evaluation of the measuring system for recording driver reaction time in virtual environment


    Contributors:
    Ogorevc, J. (author) / Cop, A. (author) / Gersak, G. (author) / Drnovsek, J. (author)

    Published in:

    Publication date :

    2012


    Size :

    5 Seiten, 4 Bilder, 2 Tabellen, 15 Quellen



    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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