ResumenSe presentan los resultados obtenidos en la estimación de la confiabilidad y la validez del Índice de Satisfacción Vital (LSI-A) de Neugarten, Havighurst & Tobin (1961, 1996. La muestra estuvo constituida por 473 adultos de 30 a 75 años (hombres y mujeres) de la Región Metropolitana de Santiago de Chile, distribuidos en tres niveles de ingreso, tres grupos de edad y tres niveles de escolaridad. Se estimó la validez de contenido, concurrente y de constructo del instrumento, definiendo 5 factores que explican el 50.62% de la varianza. La confiabilidad con alpha de Cronbach fue de 0.80 para la muestra completa, el índice varió entre 0.77 a 0.83 según edad, entre 0.77 y 0.81 según nivel educacional y entre 0.74 y 0.83 según nivel de ingreso; no se observaron variaciones según sexo (0.80).Palabras Claves: Satisfacción vital, adulto mayor, bienestar subjetivo, validación. AbstractThe findings of a research aimed to estimate reliability and validity of The Life Satisfaction Index (LSI-A) of Neugarten, Havighurst & Tobin (1961;1996) are presented. The sample consisted of 473 adults from 30 to 75 years (male and female) from Metropolitan Region of Santiago, Chile, distributed into three levels of income, age groups and educational levels. The content, concurrent and construct validity of the instrument was estimated, defining five factors accounting for 50.62% of the variance. The reliability with Cronbach's alpha was 0.80 for the full sample, the index ranged between 0.77 to 0.83 depending on age, between 0.77 and 0.81 according to educational level and between 0.74 and 0.83 depending on income level, no changes were observed by sex (0.80).
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