Big Five Inventory en Universitarios Peruanos: Resultados Preliminares de su Validación

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Abstract

RESUMEN: El presente estudio tuvo como objetivo examinar la estructura interna del Big Five Inventory (BFI) en una muestra no probabilística incidental de 332 estudiantes entre 16 y 48 años (M = 20,39) de una universidad privada de Lima Metropolitana, Perú (82,83% mujeres). Se realizó un análisis factorial exploratorio mediante el método de mínimos cuadrados no ponderados y rotación procrusteana oblicua con una matriz completamente especificada. También se calcularon las correlaciones lineales de Pearson entre los factores. La estructura factorial obtenida del BFI fue semejante a la estructura de la versión original de 44 ítems, aunque 7 ítems fueron eliminados. La versión de 37 ítems mostró buenos índices de consistencia interna, evaluada por alfa ordinal, omega y H. En conclusión, el BFI presenta indicadores psicométricos favorables que posibilitarían su uso en evaluaciones de grupo e investigación básica.

Translated abstract

ABSTRACT: The aim of this study was to examine the internal structure of the Big Five Inventory (BFI) in a nonprobability sample of 332 students (82.83% women) aged between 16 and 48 years (M = 20,39) who attended a private university in Metropolitan Lima, Peru. An exploratory factor analysis was performed using unweighted least squares and oblique Procrustes rotation with fully specified target matrix. In addition, the linear Pearson correlations between the factors were calculated. The BFI was found to have a factor structure similar to that of the original test, although 7 items were removed. The 37-items version displayed good internal consistency according to ordinal alpha, omega, and H. In conclusion, the BFI exhibits favorable psychometric indicators that suggest that it can be used in group evaluations and basic research.

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From alpha to omega: a practical solution to the pervasive problem of internal consistency estimation.

Thomas J. Dunn, Thom Baguley, Vivienne Brunsden (2014)

Coefficient alpha is the most popular measure of reliability (and certainly of internal consistency reliability) reported in psychological research. This is noteworthy given the numerous deficiencies of coefficient alpha documented in the psychometric literature. This mismatch between theory and practice appears to arise partly because users of psychological scales are unfamiliar with the psychometric literature on coefficient alpha and partly because alternatives to alpha are not widely known. We present a brief review of the psychometric literature on coefficient alpha, followed by a practical alternative in the form of coefficient omega. To facilitate the shift from alpha to omega, we also present a brief guide to the calculation of point and interval estimates of omega using a free, open source software environment. © 2013 The British Psychological Society.