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Psicothema was founded in Asturias (northern Spain) in 1989, and is published jointly by the Psychology Faculty of the University of Oviedo and the Psychological Association of the Principality of Asturias (Colegio Oficial de Psicólogos del Principado de Asturias).
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Psicothema, 2008. Vol. Vol. 20 (nº 4). 872-882




Testing for multigroup equivalence of a measuring instrument: A walk through the process

Barbara M. Byrne

University of Ottawa

This article presents an overview and application of the steps taken in testing for the equivalence of a measuring instrument across one or more groups. Following a basic description of, and rationale underlying these steps, the process is illustrated with data comprising response scores to four nonacademic subscales (Physical SC [Ability], Physical SC [Appearance], Social SC [Peers], and Social SC [Parents]) of the Self Description Questionnaire-I for Australian (N= 497) and Nigerian (N= 439) adolescents. All tests for validity and equivalence are based on the analysis of covariance structures within the framework of CFA models using the EQS 6 program. Prospective impediments to equivalence are suggested and additional caveats proposed in the special case where the groups under study represent different cultures.

Comprobando la equivalencia multigrupal de un instrumento de medida: pasos del proceso. Este artículo presenta una visión general y la aplicación de los pasos para comprobar la equivalencia de un instrumento de medida en uno o más grupos. Siguiendo la lógica y una descripción básica de estos pasos, el proceso se ilustra con los datos de las puntuaciones en cuatro subescalas no académicas (Autoconcepto sobre Aptitud Física, Autoconcepto sobre Apariencia Física, Autoconcepto Social en relación con los compañeros y Autoconcepto Social relativo a los padres) pertenecientes al Cuestionario de Auto-Descripción-I para adolescentes australianos (N= 497) y nigerianos (N= 439). Todas las pruebas de validez y equivalencia se basan en el análisis de las estructuras de covarianza dentro del marco de los modelos de análisis factorial confirmatorio, empleando el programa de ecuaciones estructurales EQS 6. Se apuntan posibles impedimentos a la equivalencia y se proponen cautelas adicionales en el caso especial de que los grupos bajo estudio representen culturas diferentes.

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