Abstract
The aim of the present study was to elucidate the differential effects of experimenter's verbal instructions based on P, M and PM leadership pattems in PM leadership theory on subject's psychomotor performance and heart rate.
Forty five junior college women were divided into three groups randomly. Subjects were tried on mirror drawing test, two three-minutes massed work periods being separated by one minute rest pause, and the same time heart rate was measured. Additionally, the psychological time was measured by estimation method, and state anxiety by Spielberger's STAI-I type. After the first work period, three groups were tested with P, M and PM instructions.
The main results were as follows;
(1) Heart rate was increased by instructions and mirror drawing test. But heart rate during the test increased in order of P, PM and M group.
(2) As regards task performance, it was found that the speed was accelerated by three instructions. But the accuracy under P instruction was not improved, and PM, M instructiohs accelerated accurate performance.
(3) Psychological time decreased in PM and M groups, but no change in P group.
(4) The decrease in state anxiety score was found only in PM group.
From these results, it was suggested that PM instruction aroused opimal arousal level.
