Psychological flexibility (PF) model has extensive evidence in several countries but its research in Brazil is limited due to lack of suitable instruments. This study gathers psychometric evidence from an FP instrument, Acceptance and Action Questionnaire-II, adapted for Brazil. After translated and adapted, 1,352 college students filled it, and same subsamples also filled scales on resilience, general health, depression and anxiety. Results indicated unidimensional structure and satisfactory reliability. FP in males was superior to females and increased with aging. There was also a positive correlation with resiliency and overall health, and a negative one with depression and anxiety. Psychometric properties were satisfactory, but ought to be evaluated in diverse samples. The instrument seems suitable for use both in studying behavior change and mechanisms of therapeutic change.
validation; AAQ-II; psychological flexibility; action and commitment therapy; psychotherapy
