Automatic Stress Classification With Pupil Diameter Analysis

Abstract : This article proposes a method based on wavelet transform and neural networks for relating pupillary behavior to psychological stress. The proposed method was tested by recording pupil diameter and electrodermal activity during a simulated driving task. Self-report measures were also collected. Participants performed a baseline run with the driving task only, followed by three stress runs where they were required to perform the driving task along with sound alerts, the presence of two human evaluators, and both. Self-reports and pupil diameter successfully indexed stress manipulation, and significant correlations were found between these measures. However, electrodermal activity did not vary accordingly. After training, the four-way parallel neural network classifier could guess whether a given unknown pupil diameter signal came from one of the four experimental trials with 79.2% precision. The present study shows that pupil diameter signal has good discriminating power for stress detection.
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International Journal of Human-Computer Interaction, Taylor & Francis, 2014, 30 (3), pp.220-236. 〈10.1080/10447318.2013.848320〉
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Marco Pedrotti, Mohammad Ali Mirzaei, Adrien Tedescho, Jean-Rémy Chardonnet, Frédéric Merienne, et al.. Automatic Stress Classification With Pupil Diameter Analysis. International Journal of Human-Computer Interaction, Taylor & Francis, 2014, 30 (3), pp.220-236. 〈10.1080/10447318.2013.848320〉. 〈hal-00962602〉

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