Abstract

SOUSA, Sónia S. et al. Contribution to the study of the Basic Need Satisfaction in General Scale to portuguese language. Psic., Saúde & Doenças [online]. 2012, vol.13, n.2, pp.209-219. ISSN 1645-0086.

This paper describes the adaptation process of the Portuguese version, comprised of 21 items, of the Basic Need Satisfaction in General Scale of self-determination theory. This instrument consists of three subscales that correspond to the three basic needs of (a) competence, (b) autonomy and (c) relatedness. It was administered in two independent studies, with 420 and 408 participants respectively, with convenience samples extracted from the community. The first phase included translation, back translation and retroversion; inspection for lexical equivalence, content validity and cognitive debriefing. In the adaptation process we evaluated whether the content validity was consistent with the original theory. Psychometric properties reveal low internal consistency in some of the subscales. In an initial exploratory analysis, in both studies, three factors emerged in the scree plot and most of the items displayed appropriate factorial load in the first factor. The results suggest that the scale may be used in the Portuguese population assuming the theoretical principles defined by the original authors and recognized in research.

Keywords : basic needs satisfaction; self-determination theory; adaptation.

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