The psychological flexibility model of behavior change underpins acceptance and commitment therapy (ACT). However, the measurement of psychological flexibility over the past 20 years has mostly hinged on the use of measures with poor discriminant validity and fuzzy boundaries with distress and negative emotionality. The current study analyzed the structure of psychological flexibility as assessed with the recently developed Multidimensional Psychological Flexibility Inventory (MPFI) and examined its link with distress. We used data from an online cross-sectional survey (N = 1542) which assessed psychological flexibility with the MPFI and the Acceptance and Action Questionnaire-II (AAQ-II), as well as anxiety, and depression. Exploratory and confirmatory factor analyses highlighted that the six psychological flexibility processes of the MPFI loaded on a psychological flexibility factor, while anxiety, depression and the AAQ-II loaded on a distress factor, supporting the discriminant validity of the MPFI in assessing psychological flexibility. Findings were consistent with those from prior studies which suggest that the AAQ-II is more of a measure of global distress than psychological inflexibility or by proxy, psychological flexibility. The 30-item MPFI psychological flexibility scale demonstrated good construct and discriminant validity. Overall, findings support psychological flexibility as a construct that is empirically distinct from distress.

行为改变的心理灵活性模型是接受和承诺治疗（ACT）的基础。但是，在过去20年中，对心理柔韧性的测量主要取决于判别效度差，边界模糊，困扰和负面情绪的测量方法的使用。当前的研究分析了心理柔韧性的结构，该结构由最近开发的多维心理柔韧性清单（MPFI）进行了评估，并检查了其与困扰的联系。我们使用了在线横截面调查（N = 1542）通过MPFI和“接受与行动问卷II”（AAQ-II）评估了心理灵活性，以及​​焦虑和抑郁。探索性和确认性因素分析强调指出，MPFI的六个心理柔韧性过程是基于心理柔韧性因子，而焦虑，抑郁和AAQ-II则是困扰因子，这支持了MPFI在评估心理柔韧性方面的判别有效性。研究结果与先前的研究结果相吻合，前者表明AAQ-II更是一种全球性困扰的量度，而不是心理上的僵硬或通过代理人的心理上的灵活性。MPFI的30个项目的心理柔韧性量表显示出良好的建构力和判别力。全面的，