身体動作リズムに基づく生理心理状態の検出

カテゴリ: 研究会(論文単位)

論文No: PI13003

グループ名: 【C】電子・情報・システム部門 知覚情報研究会

発行日: 2013/01/25

タイトル(英語): Correlation between heart rate variability and 1/f fluctuation of keystroke intervals

著者名: 野澤 昭雄(青山学院大学)

著者名(英語): Nozawa Akio(Aoyama Gakuin University)

要約(日本語): 外部刺激に対する生理心理的応答の個人性を意味する「感性」の計測は官能評価をはじめとした心理評価から，近年は脳神経系指標あるいは内分泌系指標等，より客観的な技法も開発されている。一方，センサの装着や計測自体に対する心的ストレスは感性計測の妨げとなる為，アンビエントな計測手段が求められている。本論文ではアンビエントな計測手段による感性の計測方法とその応用について報告する。

要約(英語): The objective of this study was development of an ambient, unconscious measurement technique of a mental stress based on key stroke dynamics. In this study, relationship between fluctuations of keystroke dynamics and those of cardiac activity, which was heart rate variability, were analyzed. Intervals in time between strokes of key typing were measured for 10 subjects while using a computer in conditions when auditory stimulus or cognitive stress were represented. The power spectrum of time series of the inter-stroke-time (IST) was calculated. The index, represented as beta of 1/f^beta, of the regression line of the spectrum was calculated, where f was frequency. The power spectrum density of the high frequency component (HF) of time series of R-R intervalsextracted from the Electrocardiograms (ECG) was also calculated. As a result, the power spectrumapproached to 1/f with auditory stimulus or cognitive stress, and beta and HF have significant correlation. Since HF has been known as an index of the parasympathetic nervous systems activity, it is considered that autonomous nervous systems activity reflecting psycho-physiological state affects key stroke dynamics, and they would be a possible index of a mental stress.

原稿種別: 日本語

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