Análisis psicométrico de la escala de Inflexibilidad Psicológica en población general ecuatoriana

Abstract

Abstract: Psychological Inflexibility is a relatively recent construct within psychology and current clinical practice, being the Acceptance and Action Questionnaire [AAQ-II] one of the most used instruments to evaluate it. Objective. This research sought to analyze the psychometric properties of the Psychological Inflexibility scale in the general Ecuadorian population. Method. The sample consisted of 2,093 adult participants ages 18 to 68. The factorial structure of the scale, its reliability and correlation with other measures of mental health were analyzed. Results. The AAQ-II showed a one-dimensional factorial structure, which explains that 79.41% of the total variance and a good fit to the data (comparative fit index = 0.996; Tucker Lewis index = 0.992; residual standardized root mean square = 0.00723, root mean square error of approximation = 0.0511, Akaike information criterion = 42118, and Bayesian information criterion = 42259). The reliability estimated with the Alpha and Omega coefficients were optimal (α = 0.95; ω = 0.95) and the AAQ II scores were positively correlated with health indicators such as anxiety, depression and perceived stress. Conclusions. These findings suggest that the AAQ-II scale is a reliable and valid instrument.