A Study on Effects of Waiting Period in Software Operation on the Operator's Psychophysiological State

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  • Hayasaka Yoshiaki
    Graduate School of Software and Information Science, Iwate Prefectural University
  • Kimura Tatsuhiro
    Information and Communication Technology, School of High-Technology for Human Welfare, Tokai University
  • Segawa Norihisa
    Faculty of Software and Information Science, Iwate Prefectural University
  • Miyazaki Masatoshi
    Tohoku University
  • Yamazaki Kiyoyuki
    Bio-Medical Engineering, School of High-Technology for Human Welfare, Tokai University
  • Murayama Yuko
    Graduate School of Software and Information Science, Iwate Prefectural University

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  • ソフトウェア操作における待ち時間が操作者の心理生理学的状態に及ぼす影響
  • ソフトウェア ソウサ ニ オケル マチジカン ガ ソウサシャ ノ シンリ セイリガクテキ ジョウタイ ニ オヨボス エイキョウ

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Abstract

The authors have been studying psychophysiological workload of human interface (HI) with physiological measurements and analysis. In this study, we investigated a kind of mental workload produced by user's unexpected waiting period from the request input to the termination of data processing during personal computer (PC) operation. As the experimental setting of HI, we used interactive software containing easy questions with unexpected time interval between each question. The effects of progress indicator (PI) indicating during waiting period on psychophysiological status of users were analyzed by using respiration, finger plethysmogram (PTG), heart rate (HR) and electroencephalogram (EEG) measurements. Results showed that the theta wave component of the EEG increased in the non-PI condition, even though autonomic nervous system parameters showed no significant change. Negative correlation between preference score for HI and integrated theta component percentage was observed only in non-PI condition. It is supposed that the PI was controlling theta activity coused by waiting stress in experimental condition. Utilizing physiological indices for HI assessment, this experimental method could be available to waiting stress estimation.

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