Abstract

Current assessments of social competence for children with autism spectrum disorder (ASD) are mostly designed for screening or diagnosis, not for measuring outcomes. This study aimed to develop a professional-administrated outcome measure, the Observational Social Competence Assessment (OSCA), and examine its psychometric properties. The OSCA was constructed based on a multidimensional view of social competence (i.e., social skill elements, social reciprocity, and social adjustment). For psychometric evaluation, 89 children with ASD between 3 and 12 years (mean = 70.69 months, SD = 15.31) were assessed with the OSCA and with assessments of ASD symptoms, verbal comprehension ability, and adaptive function. The results show that the OSCA has good internal consistency (Cronbach's α = 0.820-0.954), test-retest reliability (intraclass correlation coefficients [ICC] = 0.917-0.960), and inter-rater reliability (ICC = 0.905-0.974). The OSCA also has good convergent (r = 0.508-0.703, p < 0.01) and divergent validity (r = 0.105, p = 0.496), as well as good responsiveness to changes in the social adjustment dimension (Cohen's d = 1.26 and standardized response mean [SRM] = 1.92). Conclusively, these results show that the OSCA is sufficiently reliable, valid and responsive to be applied as an outcome measure of social competence in children with ASD.

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