A mental stress detection device (10) includes an index value calculation unit (200) and a correlation calculation unit (300). The index value calculation unit (200) calculates standard deviation (SDn) of heartbeat intervals (RRIn), a root mean square (RMn) of a difference RDn between temporally-adjacent heartbeat intervals (RRIn), and a ratio (SDn/RMn) between the standard deviation (SDn) and the root mean square (RMn). The root mean square (RMn) correlates with an activity of parasympathetic nerves and the ratio (SDn/RMn) correlates with an activity of sympathetic nerves. The correlation calculation unit (300) calculates a moment correlation coefficient (rn) which is a correlation between the root mean square (RMn) and (the ratio SDn/RMn) and a correlation associated with time.
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机译：精神压力检测装置（ 10 ）包括指标值计算单元（ 200 ）和相关性计算单元（ 300 ）。指标值计算单元（ 200 ）计算心跳间隔（RRI n ），均方根（RM）的标准偏差（SD n ）时间相邻心跳间隔（RRI n ）与比率（SD n n ）和均方根（RM n ）之间的Sub> / RM n ）。均方根（RM n ）与副交感神经的活动相关，比率（SD n / RM n ）与副交感神经的活动相关。交感神经。相关计算单元（ 300 ）计算矩相关系数（r n ），该矩相关系数是均方根（RM n ）之间的相关性（比率SD n / RM n ）和与时间相关的相关性。
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