The purpose of this research was to know the effectiveness of sociodrama technique in improving self concept and self efficacy of student in SMA Negeri 2 Bantul.This research type is experiment. The design used in this research was pre-test and post-test design. The subjects in this study were 27 students of class XI IPA 2. The instrument in this research was self concept scale called TSCS consisting of 84 item statements and self efficacy scale consisting of 26 item statement. Technique of data analysis in this research used t tests formula for significance level 0.05.The results showed that sociodrama technique was effective to improve self concept and self efficacy of students. Self concept and self efficacy of students increased in the “high” category. There was a difference in the end result of control class and experiment class after obtaining group guidance of sosiodrama technique with p (p-value) or sig> 0.05, then H0 was accepted.
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