著者

畑 敏道

巻号頁・発行日

2008-03-10

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In this paper, I tried to confirm the usefulness of a "lie-detector" electrical kit as a tool for quantitative analysis of the electrodermal activity (EDA) in the educational situation of elementary level of the experimental psychology. Participants (n=21) were divided into one of three groups (low (L)-, middle (M)-, or high (H)- anxiety group) based on the points of the Anthrophobic Tendency Scale (ATS) by Horii and Ogawa (1998). They were exposed to twelve times of auditory stimuli (1 kHz pure tone, 1s) and the EDA was measured by a modified "lie-detector" electrical kit, "Makoto-kun". Although the skin conductance response (SCR) of H group was higher than the other groups, the difference did not reach significant level. On the other hand, the skin conductance level (SCL) gradually increased in H group but decreased in L group following repeated exposure to the auditory stimuli and the difference between these groups were significant. The SCL in M group was intermediate level throughout the exposure to the stimuli. These findings suggest that SCL linearly correlate with the points of ATS. Our findings are consistent with a previous study (Lader and Wing, 1964) showing that the habituation rate of SCL in the patients of anxiety is slower than normal control. In conclusion, the usefulness of our system as a tool for quantitative analysis of the EDA was partly confirmed