Trends in Psychiatry and Psychotherapy
https://trends.org.br/article/doi/10.1590/2237-6089-2017-0045
Trends in Psychiatry and Psychotherapy
Original Article

Validation and invariance across gender of the Beliefs About Appearance Scale (BAAS) in a community sample of heterosexual adults in a committed relationship

Estudo de validação e invariância de gênero da Escala de Crenças Acerca da Aparência Corporal numa amostra da comunidade de adultos heterossexuais num relacionamento comprometido

Patrícia M. Pascoal; Maria-João Alvarez; Magda Sofia Roberto

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Abstract

Abstract Objective To evaluate the psychometric properties of the Beliefs About Appearance Scale (BAAS) in terms of its factorial structure and invariance, reliability, and validity when applied to adults from the community. Methods Participants consisted of 810 heterosexual Portuguese individuals in a committed relationship. As a confirmatory factor analysis did not support the original structure of the BAAS, an exploratory factor analysis was performed. Results A 12-item version was extracted comprising two dimensions: one personal and the other social. The factorial model depicting this bidimensional structure revealed an adequate fit following confirmatory factor analysis. Multigroup confirmatory factor analyses indicated invariance across gender. Concurrent and discriminant validities and internal consistency were estimated and observed to be adequate. Conclusions This shorter measure of the BAAS can accurately assess body appearance beliefs and may be used in different research settings and contexts.

Keywords

Body appearance, beliefs, validation, factor analyses, multigroup analysis

Resumo

Resumo Objetivo Avaliar as propriedades psicométricas da Beliefs About Appearance Scale (BAAS), nomeadamente sua estrutura fatorial e invariância, fidelidade e validade quando aplicada a adultos de uma amostra comunitária. Métodos Participaram 810 heterossexuais portugueses envolvidos numa relação de compromisso. Uma vez que a análise fatorial confirmatória não apoiou a estrutura original da escala, conduziu-se uma análise exploratória. Resultados Extraiu-se uma versão da escala com 12 itens, que integra duas dimensões: uma pessoal e outra social. O modelo fatorial composto por esta estrutura bidimensional revelou um ajustamento adequado aos dados, após a análise fatorial confirmatória. A análise confirmatória multigrupos indicou invariância entre os gêneros. A validade concorrente e discriminante e a consistência interna foram estimadas e apresentaram valores adequados. Conclusões A versão final, com 12 itens, da BAAS avalia com acuidade as crenças acerca da aparência corporal e pode ser utilizada em diferentes contextos de investigação.

Palavras-chave

Aparência corporal, crenças, validação, análise fatorial, análise multigrupos

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