Análisis psicométrico de las versiones breves del "Inventario para la depresión de Beck" de 1978 (BDI-IA)
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2007
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FUNVECA (Fundación VECA para el Avance de la Psicología Clínica Conductual)
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Sanz, J., y García-Vera, M. P. (2007). Análisis psicométrico de las versiones breves del "Inventario para la depresión de Beck" de 1978 (BDI-IA). Psicología Conductual, 15(2), 191-214.
Abstract
Se analizaron las propiedades psicométricas de dos versiones breves del «Inventario para la depresión de Beck» de 1978 (BDI-IA), una basada en su subescala cognitiva-afectiva (BDI-IA-SCA) y otra basada en los ítems del BDI-SF (BDI-IASF) en tres muestras (pacientes psicopatológicos, población general y estudiantes universitarios). Los coeficientes alfa de fiabilidad para las dos versiones breves fueron similares y excedieron el estándar de 0,70. Los análisis factoriales indicaron que ambos instrumentos miden una dimensión general de depresión compuesta por dos factores relacionados, cognitivo y somático en el BDI-IA-SF, y cognitivo y afectivo-motivacional en el BDI-IA-SCA. El BDI-IA-SF cubre todos los criterios sintomáticos del DSM-IV para los trastornos depresivo mayor y distímico, menos dos; el BDI-IA-SCA se centra en los síntomas afectivos-cognitivos, no cubriendo cuatro síntomas somáticos. Ambos instrumentos mostraron índices aceptables de precisión diagnóstica, pero ninguna puntuación sirvió por sí misma para realizar un diagnóstico diferencial entre pacientes con y sin trastornos depresivos. Las dos versiones breves del BDI-IA pueden ser sustitutas fiables y válidas de éste cuando la rapidez de la administración es importante.
The psychometric properties of two short forms of the 1978 version of the Beck Depression Inventory (BDI-IA) were examined in three samples (psychopathological patients, general population, and university students). One short form (BDI-IA-SCA) is based on the cognitive-affective subscale of the BDI-IA; the other short form (BDI-IA-SF) is based on the BDI-SF. Reliability alpha coefficients for both short forms were similar and exceeded the standard of 0,70. Factor analyses suggested that both instruments measure a general dimension of depression composed of two highly related factors: a cognitive factor and a somatic one for the BDI-IA-SF, and a cognitive factor and an affective-motivational one for the BDI-IA-SCA. With two exceptions, all the symptomatic criteria proposed by the DSM-IV for major depressive and dysthymic disorders are accounted for the BDI-IA-SF; the BDI-IA-SCA is focused on affective-cognitive symptoms, and does not cover four somatic symptoms. Both instruments showed adequate indices of diagnostic accuracy, but there was no single cut-off score that allowed for a differential diagnosis between patients with or without depressive disorders. Both short forms can serve as reliable and valid substitutes for the BDI-IA when speed of administration is important.
The psychometric properties of two short forms of the 1978 version of the Beck Depression Inventory (BDI-IA) were examined in three samples (psychopathological patients, general population, and university students). One short form (BDI-IA-SCA) is based on the cognitive-affective subscale of the BDI-IA; the other short form (BDI-IA-SF) is based on the BDI-SF. Reliability alpha coefficients for both short forms were similar and exceeded the standard of 0,70. Factor analyses suggested that both instruments measure a general dimension of depression composed of two highly related factors: a cognitive factor and a somatic one for the BDI-IA-SF, and a cognitive factor and an affective-motivational one for the BDI-IA-SCA. With two exceptions, all the symptomatic criteria proposed by the DSM-IV for major depressive and dysthymic disorders are accounted for the BDI-IA-SF; the BDI-IA-SCA is focused on affective-cognitive symptoms, and does not cover four somatic symptoms. Both instruments showed adequate indices of diagnostic accuracy, but there was no single cut-off score that allowed for a differential diagnosis between patients with or without depressive disorders. Both short forms can serve as reliable and valid substitutes for the BDI-IA when speed of administration is important.