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Unveiling the Psychometric Properties of the Satisfaction with Life Scale: An Item Response Theory Study in Gay Adults
Desvelando las Propiedades Psicométricas de la Escala de Satisfacción con la Vida: Un Estudio de Teoría de Respuesta al Ítem en Adultos Homosexuales
DOI:
https://doi.org/10.15446/rcp.v35n1.117569Keywords:
Item Response Theory, Satisfaction with life, cisgender gay people, sexual orientation, Psychometric properties (en)Teoría de Respuesta al Ítem, satisfacción con la vida, personas homosexuales cisgénero, orientación sexual, propiedades psicométricas (es)
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The Satisfaction with Life Scale (SWLS) has been validated in heterosexual individuals using Classical Test Theory (CTT). The aim of the present study was to analyze the psychometric properties of the SWLS using Item Response Theory (IRT) to address gaps in the existing literature. The original structure comprising five items, as well as an abbreviated version with four items, were examined in a sample of 400 cisgender gay people from Lima, Peru. The results confirmed the unidimensionality of the scale in both versions, which demonstrated adequate psychometric properties with slight differences. Both versions can be used interchangeably without affecting the scale's structure. However, if the objective is to assess more accurately across a broader range of abilities, the 5-item version appears to be superior. Practical implications are discussed."
La Escala de Satisfacción con la Vida (SWLS) cuenta con múltiples validaciones en personas heterosexuales desde la teoría Clásica de Tests (CTT). El objetivo del presente estudio fue analizar sus propiedades psicométricas a partir de la Teoría de Respuesta al Ítem (TRI). Se examinó la estructura original de cinco ítems y una versión abreviada de cuatro, en una muestra de 400 personas gais cisgénero de Lima (Perú). Los resultados confirmaron la unidimensionalidad de la escala en sus dos versiones, con adecuadas propiedades psicométricas y ligeras diferencias. Ambas versiones pueden ser utilizadas indistintamente sin afectar su estructura, pero si el objetivo es evaluar con mayor precisión en el rango de habilidades, la versión de 5 ítems parece ser superior. Se discute sus implicancias a nivel práctico.
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