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Revista Brasileira de Educação Especial

versão impressa ISSN 1413-6538versão On-line ISSN 1980-5470

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TORRES, Manuel; MOREIRA, Clarissa; GOMES, Fernando  e  SANTOS, Sofia. Arc’s Self-Determination Scale: Adaptation and Validation to the Portuguese Adolescent and Adult Population with IDD. Rev. bras. educ. espec. [online]. 2022, vol.28, e0135.  Epub 25-Fev-2022. ISSN 1980-5470.  https://doi.org/10.1590/1980-54702022v28e0135.

In the current Portuguese context, the generalized difficulty in obtaining assessment instruments adapted to the population with Intellectual and Developmental Difficulties (IDD) that evaluate the construct of self-determination is still visible. In this sense, this paper aims to adapt and validate the Arc’s Self-Determination Scale to the Portuguese adolescent and adult population with IDD. To this end, it was considered the international guidelines in cross-cultural adaptation process, culminating with an evaluation of 11 experts for the quantitative evidence of the content validity. All items of this scale were considered as relevant or very relevant (n=72) and there was a moderated (k>.40) and an excellent agreement (k>.75) among the experts in the calculation of Cohen’s Kappa. The sample comprised 500 adolescents/adults, aged between 16 and 70 years-old (24.03±9.15), 256 females and 244 males with and without IDD. The scale showed an excellent internal consistency (α=.89) and weak to moderate correlations between sections (.01>r<.51). The procedures inherent to the validity of construct are also presented and discussed. The main results seem to point out the idea that the instrument under study presents the characteristics of validity and reliability required so that it can be used at the national level.

Palavras-chave : Self-Determination; Intellectual and Developmental Disability; Validity; Reability.

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