Abstract
Introduction:The present study aimed to investigate validity and reliability of Persian Dimensions of Mastery Questionnaire (DMQ18) in children with cerebral palsy.Material and Methods:The original version was carried out through back translation into Persian, and then the construct validity was assessed by confirmatory factor analysis; and reliability was evaluated through Cronbach’s alpha (n=230). Intra-class correlation coefficient (ICC) was used for test retest reliability (n=32).Results:230 parents (155 (67.4%) mothers and 75 (32.6%) fathers) of children and adolescents with CP with an average age of 126.99±24.59 months participated in the present research. Non-questions excluded from the confirmatory factor analysis, and thus all questions remained. Internal consistency reliability and total score were acceptable in all domains (higher than 0.70) except for negative reactions, sadness/shame (Cronbach’s alpha of 0.414). Intra-class correlation coefficient of all domains and total score were significant (p<0.001).Conclusion:DMQ18 (parental report) was valid and reliable for children with cerebral palsy. It also provided valuable information about different aspects of motivation in CP children according to their parents’ opinion, and thus it can be used in clinical interventions.
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