Assessment of psychological (in)flexibility in the Portuguese population: Validation of the brief version of the Multidimensional Psychological Flexibility Inventory (MPFI-24)
DOI:
https://doi.org/10.31211/rpics.2023.9.1.285Keywords:
Psychological Flexibility, Psychological inflexibility, Assessment, Factor structure, Psychometric validation, Quantitative studyAbstract
Objective: Translation and validation of the brief version of the Multidimensional Psychological Flexibility Inventory (MPFI-24) for the Portuguese population. Methods: The sample consisted of 650 participants aged between 18 and 74 years. Participants completed an online protocol consisting of a sociodemographic questionnaire, the Multidimensional Psychological Flexibility Inventory-24 (MPFI-24), the Psy-Flex, the Patient Health Questionnaire-4 (PHQ-4), and the Mental Health Continuum-Short Form (MHC-SF). Results: Confirmatory factor analysis of the MPFI-24 showed the plausibility of the two-factor higher-order model with six first-order Psychological Flexibility (PF) factors and six first-order Psychological Inflexibility (PI) factors. The MPFI-24 showed adequate reliability, with alpha values greater than .70 on the overall indices and on all factors. It also showed good temporal stability. The PF showed a positive association with psychological flexibility, as assessed by Psy-Flex, and with the perception of mental health (MHC-SF) and a negative association with negative emotional states (PHQ-4). PI revealed the opposite pattern, with all correlations being moderate and significant. Age showed a positive association with FP and a negative association with PI. No gender differences were found for the two global indicators. Conclusions: The MPFI-24 proved to be a valid and reliable inventory to assess PF and PI in adults from the Portuguese population. This instrument can be used in clinical and research contexts and can be a relevant contribution to the design of interventions aimed at increasing psychological flexibility.
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