抄録
In order to measure the mental tension we selected the following 5 phenomena: Electroencephalogram, Microvibration, Galvanic skin reflex, Plethysmogram, Pneumograph, and observed the development of tension from the beginning to the peak of it. The method of study. The examinees were five women, 21-25 years of age. We employed following two kinds of suggestion in order to cause mental tension. Suggestion I. "You shall have an electric shock in 7 minutes from now." Suggestion 2. "You shall have an electric shock stronger than you had before, in 7 minutes from now." (though it was not really stronger.) The result of study. (1)The Electroencephalogram, after the beginning of tension, showed a decrease in α wave and an increase in β wave. (2) The Galvanic skin reflex, from the beginning of tension, showed more frequent appearances and lager amplitude. (3) The Microvibration, as tension rose, showed a decrease in α wave and a conspicuous incr6ase in θ wave. (4)The plethysmogram, from the beginning of tension, showed more frequent oscillation of the standard line, but smaller amplitude. (5)The Pneumograph, from the beginning of tension, showed an increase of frequency in breathing.
