Developmental theories suggest age-related changes in the structure of affect. Paradoxically, the internal structure of the Positive and Negative Affect Schedule (PANAS; Watson, Clark, & Tellegen, 1988) has not been tested in Spanish older adults by means of confirmatory factor analysis (CFA) despite it is the most widely used measure of emotional well-being in later life. The aim of this study was to examine competing models of the internal structure of the Spanish version of the PANAS, its measurement invariance, reliability, and external validity. Participants were a representative sample of 585 community-dwelling people aged 60 and over, who also completed depression, loneliness and life satisfaction measures. Results showed that the orthogonal two-factor model with correlated errors (RMSEA = .057, 90% CI [.051, .063], SRMR = .084, CFI = .97, NNFI = .97) was the best fitting solution. Measurement invariance analyses confirmed that the two-independent factor structure can be used across young-old and very old people, as well as in both males and females. It showed good reliability (PA: α = .93, NA: α = .83), criterion, convergent and discriminant validity (p < .01). Our discussion highlights the role of age and culture in the experience and expression of emotions.

Título: Estructura factorial de la escala de soledad de de Jong Gierveld en personas mayores españolas. Resumen: La soledad es un importante componente en la medición del bienestar subjetivo de las personas mayores. El instrumento más influyente en Europa es la escala de soledad de 11 ítems de De Jong Gierveld (DJGLS; de Jong Gierveld y Kamphuis, 1985). El objetivo de esta investigación era examinar la estructura interna de la versión española de la DJGLS. La muestra estaba compuesta por 328 personas mayores (M = 75.53, Rango = 60-99 años) no institucionalizadas. Los análisis factoriales mostraron que la escala era esencialmente unidimensional (RMR = .088, AGFI = .97). La fiabilidad fue de .91. No se encontraron razones sustantivas ni estadísticas para considerar la existencia de un segundo factor. Nuestros resultados revelaron algunos problemas de los ítems para medir los aspectos sociales y emocionales de la soledad como factores distintos. Se resalta la necesidad de mejorar la escala y de tener en cuenta las diferencias entre las culturas colectivistas e individualistas en el uso de los instrumentos que miden el bienestar. Palabras clave: Soledad; personas mayores; validez; análisis factorial; colectivismo-individualismo. Abstract:Loneliness is an important component in the measurement of subjective well-being of elderly adults. The most influential instrument in Europe is the 11-item de Jong Gierveld loneliness scale (DJGLS; de Jong Gierveld and Kamphuis, 1985). The aim of this study was to examine, throughout factorial techniques, the internal structure the Spanish version of the DJGLS. Data were gathered from 328 community-dwelling elderly adults (M = 75.53, Range: 60-99 years). The factor analysis techniques revealed that the scale was essentially unidimensional (RMR = .088, AGFI = .970, NFI = .966). Reliability was .91. Neither substantive nor statistical reasons were found to consider the existence of a second factor. Our findings also revealed some psychometric problems in the measurement of the social and emotional aspects of loneliness. Emphasis is placed on the need to improve the scale and bear in mind the differences between collectivist and individualist cultures in the use of scales measuring well-being.