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http://dx.doi.org/10.14695/KJSOS.2017.20.3.13

Analysis of Galvanic Skin Response Signal for High-Arousal Negative Emotion Using Discrete Wavelet Transform  

Lim, Hyun-Jun (Department of Medical Engineering, Yonsei University College of Medicine)
Yoo, Sun-Kook (Department of Medical Engineering, Yonsei University College of Medicine)
Jang, Won Seuk (Department of Medical Engineering, Yonsei University College of Medicine)
Publication Information
Science of Emotion and Sensibility / v.20, no.3, 2017 , pp. 13-22 More about this Journal
Abstract
Emotion has a direct influence such as decision-making, perception, etc. and plays an important role in human life. For the convenient and accurate recognition of high-arousal negative emotion, the purpose of this paper is to design an algorithm for analysis using the bio-signal. In this study, after two emotional induction using the 'normal' / 'fear' emotion types of videos, we measured the Galvanic Skin Response (GSR) signal which is the simple of bio-signals. Then, by decomposing Tonic component and Phasic component in the measured GSR and decomposing Skin Conductance Very Slow Response (SCVSR) and Skin Conductance Slow Response (SCSR) in the Phasic component associated with emotional stimulation, extracting the major features of the components for an accurate analysis, we used a discrete wavelet transform with excellent time-frequency localization characteristics, not the method used previously. The extracted features are maximum value of Phasic component, amplitude of Phasic component, zero crossing rate of SCVSR and zero crossing rate of SCSR for distinguishing high-arousal negative emotion. As results, the case of high-arousal negative emotion exhibited higher value than the case of low-arousal normal emotion in all 4 of the features, and the more significant difference between the two emotion was found statistically than the previous analysis method. Accordingly, the results of this study indicate that the GSR may be a useful indicator for a high-arousal negative emotion measurement and contribute to the development of the emotional real-time rating system using the GSR.
Keywords
Emotion; Bio-signal; Galvanic Skin Response; Phasic Component; Discrete Wavelet Transform;
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