The Multidimensional Psychological Flexibility Inventory (MPFI) is a recently developed measure of psychological flexibility and inflexibility based on the psychological functioning model of behavior change that underpins Acceptance and Commitment Therapy (ACT). The present study sought to develop a validation of this measure in Italian language from its English original version and explored the factor structure and reliability as well as convergent and concurrent validity of the Italian version of the MPFI. A total of 1,542 participants (71% female, M = 38.6 years old, SD = 15.0 years) completed an online cross-sectional survey including the Italian MPFI, other measures of psychological flexibility, and measures of metal health (anxiety, depression, and well-being). Confirmatory factor analysis replicated the factor structure of the original MPFI. The Italian MPFI had a two second-order factor structure composed of six first-order factors of flexibility and six first-order factors of inflexibility, with good construct validity. The Italian MPFI evinced good internal consistency, and convergent and concurrent validity. It also exhibited measurement invariance for gender, age, and mental health status. The Italian MPFI is a psychometrically sound measure of psychological flexibility and inflexibility in the Italian context. The Italian MPFI offers new tools in ACT theoretical and intervention research in Italy.

多维心理灵活性量表 (MPFI) 是最近开发的一种基于行为改变的心理功能模型的心理灵活性和不灵活性量表，该模型支持接受和承诺疗法 (ACT)。本研究试图从其英文原始版本的意大利语语言中验证该度量，并探讨了 MPFI 意大利语版本的因子结构和可靠性以及收敛和并发效度。共有 1,542 名参与者（71% 女性，M  = 38.6 岁，SD = 15.0 岁）完成了一项在线横断面调查，包括意大利 MPFI、其他心理灵活性测量和金属健康测量（焦虑、抑郁和幸福感）。验证性因子分析复制了原始 MPFI 的因子结构。意大利MPFI具有两个二阶因子结构，由六个一阶灵活性因子和六个一阶刚性因子组成，具有良好的结构效度。意大利 MPFI 表现出良好的内部一致性，以及收敛和并发效度。它还表现出性别、年龄和心理健康状况的测量不变性。意大利 MPFI 是意大利语境中心理灵活性和不灵活性的心理测量学上合理的衡量标准。意大利 MPFI 为意大利的 ACT 理论和干预研究提供了新工具。