Psychometric Properties and Normalization of Persian Version of Ottawa Mental Skills Assessment Tools (OMSAT-3)

The purpose of this study was determining validity and reliability of the Persian version of OMSAT-3 questionnaire. For this purpose، 480 athletes with different levels of skill in 10 sport fields، individual and team، were chosen by random sampling and completed the questionnaires. The method of the research was as follows: first، with use of translation-back translation methods، face validity and translate accuracy of Persian version of questionnaires were confirmed. Confirmatory factor analysis based on structural equations was used for validation of structure of questionnaire، Cronbach alpha coefficient was used for internal consistency of questionnaire، and intra-class correlation coefficient under test-retest method was used to study temporal reliability of items and percentile points was used for normalization. The results of research showed that first-order and second-order confirmatory factor analysis، Cronbach alpha coefficient and intra-class correlation coefficient of Persian version of OMSAT-3 questionnaire supported 3-factor and 48-item structure of the initial questionnaire، and confirm construct validity، internal consistency and temporal reliability of OMSAT-3.