The purpose of this study is to investigate the validity and reliability of the Turkish adaptation of Mindfulness-Based Self Efficacy Scale Revised developed by Cayoun, Francis, Kasselis, and Skilbeck (2012). The original form of the scale is in English and consists of 22 likert-type five-point items in a six-factor structure. The revised version of the Turkish form was applied to a sample of 713 students in 5th, 6th and 7th grades in two different public schools. The internal consistency coefficient Cronbach Alpha for the entire scale (= .72) and the factors Emotion Regulation (= .73), Equanimity (= .68), Social Skills (= .65), Distress Tolerance (= .62), Taking Responsibility (= .61) and Interpersonal Effectiveness (= .65) were found to be at acceptable values when the low number of items in each subscale is taken into consideration. Discriminant validity test results revealed that there were no statistically significant differences between the average means of boys and girls, whereas there were statistically significant differences in the average means based on students grade levels. The results indicated that the Turkish adaptation of the scale is a valid and reliable instrument of measuring students mindfulness-based self-efficacy. Both theoretical and methodological implications of the findings are discussed.
Key words: Mindfulness, Self-efficacy, Instrument Adaptation, Validity, Reliability
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