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Human Factors: The Journal of the Human Factors and Ergonomics Society
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Preparing Computers for Affective Communication: A Psychophysiological Concept and Preliminary Results

Min Cheol Whang

Sangmyung University, Seoul, Korea

Joa Sang Lim

Sangmyung University, Seoul, Korea

Wolfram Boucsein

University of Wuppertal, Wuppertal, Germany

Despite rapid advances in technology, computers remain incapable of responding to human emotions. An exploratory study was conducted to find out what physiological parameters might be useful to differentiate among 4 emotional states, based on 2 dimensions: pleasantness versus unpleasantness and arousal versus relaxation. The 4 emotions were induced by exposing 26 undergraduate students to different combinations of olfactory and auditory stimuli, selected in a pretest from 12 stimuli by subjective ratings of arousal and valence. Changes in electroencephalographic (EEG), heart rate variability, and electrodermal measures were used to differentiate the 4 emotions. EEG activity separates pleasantness from unpleasantness only in the aroused but not in the relaxed domain, where electrodermal parameters are the differentiating ones. All three classes of parameters contribute to a separation between arousal and relaxation in the positive valence domain, whereas the latency of the electrodermal response is the only differentiating parameter in the negative domain. We discuss how such a psychophysiological approach may be incorporated into a systemic model of a computer responsive to affective communication from the user.

Human Factors: The Journal of the Human Factors and Ergonomics Society, Vol. 45, No. 4, 623-634 (2003)
DOI: 10.1518/hfes.45.4.623.27095
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