Psychometric properties of the metacognitions questionnaire-30 in Turkish outpatient adolescents

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BACKGROUND: The Metacognitions Questionnaire-30 (MCQ-30) is widely used to assess dysfunctional metacognitive beliefs in both clinical and non-clinical adolescent populations. As no adolescent-specific validation has been conducted in Turkey, this study aimed to evaluate the reliability and validity of the MCQ-30 in Turkish adolescents. METHOD: The sample included 338 adolescents aged 11–18 years who had applied to child and adolescent psychiatry outpatient clinics. Participants completed a sociodemographic and clinical data form, the MCQ-30, the Revised Children’s Anxiety and Depression Scale–Child Version (RCADS-CV), and the Strengths and Difficulties Questionnaire (SDQ) on an online platform. RESULTS: The mean age of the participants was 15.3 years (SD = 1.9). Among them, 111 (32.8%) were male and 227 (67.2%) were female. The Turkish MCQ-30 showed good to excellent internal consistency and a well-fitting five-factor structure, including positive beliefs (α = 0.820), negative beliefs about uncontrollability and danger (α = 0.885), cognitive confidence (α = 0.860), need to control thoughts (α = 0.947), and cognitive self-consciousness (α = 0.866). Internal consistency for the total score was excellent (α = 0.918), and test–retest analyses further supported the reliability of the scale. The MCQ-30 showed moderate-to-large positive correlations with measures of anxiety and depression, supporting its convergent validity. Additionally, the lack of a significant association with the SDQ prosocial behavior subscale provides evidence for its discriminant validity. CONCLUSION: These findings confirm the Turkish MCQ-30 as a reliable and valid measure of metacognitive beliefs in adolescents, supporting its use in clinical practice and research.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.