Abstract
This study is to investigate, by the labora ory experiment, the effect of leaders' LPC scores and success vs. failure on group process. The subjects of this experiment are girls of senior high school in Japan. Each experimental group, composed of 4 girls, is assigned to discuss cases on problem behavior of youth. The conditions of success vs. failure were operated by the experimenter's false feedback that the outcome of group discussion was evaluated by specialists. The informal leader of each group was defined by the socio-metric item, in which members made entry after the experimental session. The main results of this experiment, on the base of responses to questionnaire items filled in, by the members except the informal leaders, are as follows;
(1) The group memlbers led by high LPC leaders, rate their own group atmosphere more favorably in successful coditions than in failure conditions. The members under low LPC leaders, however, describe their own group atmosphere to be slightly more favorable in failure conditions than in successful ones.
(2) The group members led by high LPC leaders, are more satisfied with the information given by the experimenter on the case, in successful conditions than in failure ones. Neverthless, the members under low LPC leaders express more satisfaction with the information in failure conditions than in successful ones.
(3) Group cohesiveness is generally higher in successful conditions than in failure conditions.
