PSYCHIC STRESS EVALUATION METHOD AND APPARATUS

PROBLEM TO BE SOLVED: To provide a psychic stress evaluation method and device precisely evaluating the psychic stress of a subject. SOLUTION: This psychic stress evaluation device is provided with a measuring means 10 measuring an electrocardiogram or a pulse wave of the subject, a signal processing part 23 generating a time fluctuation waveform of a heartbeat (RR) interval or a pulse wave interval by computing and interpolating a peak interval of a time waveform obtained from the measured electrocardiogram or the pulse wave, a power spectrum generating means 24 generating a power spectrum corresponding to the heartbeat fluctuation or the pulse wave fluctuation based on the time fluctuation waveform of the heartbeat (RR) interval or the pulse wave interval, an average power computing means 26 computing an average power value and/or an average power frequency relative to a predetermined frequency band of 0.2 Hz or less in the power spectrum, and a stress evaluation means 28 evaluating the psychic stress of the subject based on the fluctuation in the average power value and/or the average power frequency. COPYRIGHT: (C)2005,JPO&NCIPI