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ThinkMind // AMBIENT 2014, The Fourth International Conference on Ambient Computing, Applications, Services and Technologies // View article ambient_2014_4_10_40013


Transient Stress Stimulus Effects on Intentional Facial Expressions - Estimation of Psychological States based on Expressive Tempos -

Authors:
Kazuhito Sato
Takashi Suto
Hirokazu Madokoro
Sakura Kadowaki

Keywords: Psychological measures, stress; Intentional facial expression; Machine learning approaches; Behavior modeling

Abstract:
This paper presents a framework of tempos and rhythms to clarify the relevance between psychological states and facial expressions, particularly addressing repetitive operations of intentional facial expressions after giving a stress stimulus. By acquiring image datasets of facial expressions under the states of pleasant–unpleasant stimulus for 20 subjects, we extracted expressive tempos for respective subjects. Consequently, averages of extraction rates show that the pleasant state was 81.1%. The unpleasant state was 77.8%. Regarding effects of pleasant–unpleasant stimulus on the expressive tempos, particularly addressing the variation of the number of frames constituting one tempo, the variation in unpleasant stimulus became greater than that in the pleasant stimulus. The results show that the analysis using expressive tempos and rhythms is valid as an indicator for estimating the psychological state.

Pages: 72 to 81

Copyright: Copyright (c) IARIA, 2014

Publication date: August 24, 2014

Published in: conference

ISSN: 2326-9324

ISBN: 978-1-61208-356-8

Location: Rome, Italy

Dates: from August 24, 2014 to August 28, 2014

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