The purpose of this article is to adapt and validate the short form of the Posttraumatic Growth Inventory (PTGI-SF) in Spanish. The scale consists of 10 items distributed in 5 posttraumatic growth dimensions measured in the original instrument. The psychometric properties and dimensionality of the scale are examined in a sample of college students (N = 681). Results lend support to the validity and reliability (α = .83) of the PTGI-SF. The dimensions of PTGI-SF show correlations ranging between .29 and .52. In addition, the inventory correlates significantly with deliberate rumination (r = .39) and the search for meaning in life (r = .32). The factor loadings of the items in the confirmatory factor analysis varied between .52 and .87, showing good fit indexes (comparative fit index = .97, Tucker-Lewis index = .93, relative fit index = .90, incremental fit index = .97, normed fit index = .96, and root mean square error of approximation = .05). Multi-group confirmatory factor analysis supported invariance of the PTGI-SF across the 2 groups. Finally, significantly higher PTGI-SF scores were observed in subjects who were actively looking for meaning in life, or had found it after a seeking process, than in subjects who had not looked for meaning in life or had given up because they had not been successful.

ResumenEl objetivo de este artículo es adaptar y validar la Escala de Apoyo Social Subjetivo (EASS, de Vaux et al., 1986), a la vez que describir su estructura factorial. Esta escala está compuesta por 10 ítems distribuidos en dos dimensiones: apoyo familiar y apoyo de los amigos. Se examinan las propiedades psicométricas de la escala y la dimensionalidad de la misma en una muestra de estudiantes universitarios chilenos (N = 681). Los resultados indican que el EASS constituye un instrumento fiable (α = .86) y válido para la medición del apoyo social subjetivo. Las dimensiones de la EASS obtienen entre sí una correlación significativa y moderada (r = .41; p < .001). Las cargas factoriales para los ítems en el análisis factorial confirmatorio fluctuaron entre .40 y .93, mostrando buenos índices de ajuste para el modelo de dos factores de primer orden correlacionados (CFI = .97, TLI = .93, RFI = .97, IFI = .97, NFI = .96 y RSMEA = .08). Palabras clave: Apoyo social subjetivo, apoyo familiar, apoyo de amistades, propiedades psicométricas FACTOR STRUCTURE OF THE SUBJECTIVE SOCIAL SUPPORT SCALE: VALIDATION WITH A SAMPLE OF UNIVERSITY STUDENTS IN CHILE AbstractThe purpose of this paper is to adapt and validate the Subjective Social Support Scale (Vaux et al, 1986) and to describe its factor structure. The scale consists of 10 items distributed in two dimensions measured in the original instrument: family support and support from friends. The psychometric properties and dimensionality of the scale are examined in a sample of Chilean college students (N = 681). Results show that the scale is a reliable instrument (α = .86) and valid for measuring subjective social support. Its two dimensions show a moderate and significant correlation (r = .41; p < .001). The factor loadings of the items in the confirmatory factor analysis varied between .40 and .93, showing good fit indices for the correlated first order two factor model (CFI = .97, TLI = .93, RFI = .97, IFI = .97, NFI = .96 and RSMEA = .08).

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