Psychometric properties of the Cognitive Behaviour Therapy Scale for Children and Young People (CBTS-CYP) in a Turkish sample

Background: Cognitive behavioural therapy (CBT) training is highly demanded by clinicians; however, a standardized competence assessment for professionals working with children and young people (CYP) can be problematic. Psychometric tools used for this purpose are typically adult oriented measures. Aim: The present study provides psychometric properties of the Cognitive Behaviour Therapy Scale for Children and Young People (CBTS-CYP) derived from a comparative analysis with the Cognitive Therapy Scale (CTS). Method: The CBTS-CYP was used alongside CTS in a CBT supervision training course, consisting of a cohort of 51 therapists. A total of 36 audio/video recorded full CBT sessions were assessed for the purpose of determining CBT competence and adherence to the theory and model. The training involved a total of 80 hours of supervision in 10 meetings via an online videoconferencing platform between July 2020 and February 2021. Results: Face validity and inter-rater reliability of CBTS-CYP were high, with the intraclass correlation values being good (0.60-0.74) or excellent (0.74 and above); the correlations of each CBTS-CYP and CTS items were significant; internal consistency of the scale showed that Cronbach alpha values for total-scale and its two subdimensions were above .93. For a cut-off score of 55 out of 90, sensitivity reached 90.73% and specificity 90.73%. A score of 2 points or above from any single item could be considered as the second minimum criterion for competence. Conclusions: CBTS-CYP offers a valid and reliable scale to evaluate the competence and adherence quality of CBT sessions with children and adolescents.