Facing an infertility diagnosis and the demands of infertility medical treatment has been widely recognized as a psychologically distressing condition and psychological inflexibility may be a relevant construct to better understand mental health in this population. In this context, the current study aimed to develop a new self-report measure, the Psychological Inflexibility Scale – Infertility (PIS–I), and examine its factor structure and psychometric properties. Based on the Acceptance and Commitment Therapy (ACT) conceptual framework, literature review and clinical expertise in the infertility domain, an initial pool of 18 items was developed. An online survey was conducted with 287 women presenting an infertility diagnosis. Exploratory Factor Analysis revealed that a refined version of the PIS-I, encompassing 16 items, presented a single-component structure accounting for 58.92% of the variance. Psychometric analyses showed an excellent internal consistency and support for the PIS-I convergent, concurrent, and incremental validities was found. Overall, the PIS-I showed to be a context-specific reliable and valid measure of psychological inflexibility for people dealing with infertility, being useful for clinical and research purposes.

面对不育症诊断和不育症治疗的需求已被广泛认为是一种心理困扰状态，而心理僵硬可能是更好地了解该人群心理健康的一种重要手段。在这种情况下，当前的研究旨在开发一种新的自我报告测量方法，即心理不灵活性量表-不育症（PIS–I），并检查其因素结构和心理计量学特性。基于接受和承诺疗法（ACT）的概念框架，文献综述以及不孕领域的临床专业知识，初步开发了18个项目。对287位表现出不育症诊断的妇女进行了在线调查。探索性因素分析显示，经过改进的PIS-I版本涵盖16个项目，提出了单成分结构，占差异的58.92％。心理计量学分析显示出极好的内部一致性，并为PIS-I收敛，并发和增量有效性提供了支持。总的来说，PIS-I是针对不育症患者的一种针对特定情境的可靠且有效的心理僵硬度量，可用于临床和研究目的。