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Romanian Adaptation and Validation of the Multidimensional Psychological Flexibility Inventory
Ștefan Marian1, Iulia Crişan1, Ștefan Sergiu Varga1
1Department of Psychology, West University of Timişoara, Timișoara, Romania.
Evaluation & the Health Professions
|March 3, 2026
Summary
This study validated the Romanian version of the Multidimensional Psychological Flexibility Inventory (MPFI) for assessing psychological flexibility and inflexibility within the Acceptance and Commitment Therapy (ACT) Hexaflex model.
Area of Science:
- Psychology
- Clinical Psychology
- Psychometrics
Background:
- The Multidimensional Psychological Flexibility Inventory (MPFI) assesses Acceptance and Commitment Therapy's (ACT) Hexaflex model.
- Limited research exists on the MPFI's invariance and discriminant validity concerning negative automatic thoughts.
Purpose of the Study:
- To adapt and validate the MPFI for a Romanian population.
- To examine the psychometric properties of the MPFI in a new cultural context.
Main Methods:
- A Romanian adaptation of the MPFI was administered to 1109 general population participants.
- Statistical analyses were conducted to assess model fit, internal consistency, invariance, and convergent/discriminant validity.
Main Results:
- The Romanian MPFI demonstrated adequate model fit and high internal consistency.
- The instrument showed invariance across gender and age, supporting convergent and discriminant validity.
- Unexpected correlations between MPFI dimensions and acceptance/avoidance suggest potential refinements.
Conclusions:
- The Romanian MPFI is a psychometrically sound tool for studying the ACT Hexaflex model.
- It can be utilized to evaluate psychological flexibility and inflexibility in clinical practice and research.
- Further investigation is needed to understand theory-incongruent correlations observed in the study context.
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