Presentation

María Soledad Carrión Rojas, Víctor Manuel López Guerra
Private Technical University of Loja

Abstract

Psychological Inflexibility is a relatively recent construct in psychology and current clinical practice, and the Acceptance and Action Questionnaire (AAQ -II) is one of the most widely used instruments to assess it. The objective of this research was to analyze the psychometric properties of the Psychological Inflexibility scale in the Ecuadorian general population. The sample consisted of 2093 adult participants from 18 to 68 years of age. The factorial structure of the scale, its reliability and correlation with other measures of mental health were analyzed. The AAQ -II showed a onedimensional factorial structure, which explains 79.41% of the total variance, and adjusts well to the data (comparative fit index = 0.996; Tucker Lewis index = 0.992; residual standardized mean square root = 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 was 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. These findings suggest that the AAQ -II scale is a reliable and valid instrument.

Keywords:psychological inflexibility, AAQ -II, psychometric analysis