The sample were youths studying at 3 tripitaka School in amphoe muang Chiang mai during the first semester of the 1998 academic year . Youths were randomly assigned to tow group, namely, experimental group or group counseling group (n=10), and control group (n=12), both group were presented using P-A-C. Personality scale before and after the treatment.The results showed that.The research hypothesis was supported that is youths in the experimental group has P-A-C scores on adult Ego state significantly at.05 level higher than those in the control group, and parent Ego stage lower than those in the control group.
However, the different the child Ego Stage between the experimental and control group were not found.The results of the research and its applications and suggested in the thesis.