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The purpose of this study was to assess the effectiveness of the psychological sufficiency development program for the staff of the College of Dramatic Arts of the Bunditpatanasilpa Institute. This research employed a quasi-experimental design. Forty state employees were equally divided into experimental and control groups. The achievement motivation test and the psychological sufficiency test were used in the pre-test. After the program, the psychological sufficiency test was used both as an immediate post-test and a one-month follow-up questionnaire. The results showed that the post-test scores of the experimental group were higher than the pre-test scores of both the experimental group and control group with statistical significance. In addition, the post-test scores of the experimental group were slightly lower than the one-month follow-up scores of the experimental group but was higher than the one-month follow-up scores of the control group. The results confirms that the program can improve psychological sufficiency in the state employees. Therefore, it is advisable to use the study model for long-term psychological sufficiency development to maintain permanent psychological sufficiency.
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