This study examined the psychometric properties of the recently developed six-item Psy-Flex among community samples in Korea. Using a cross-sectional design, data were collected from 1059 participants. Three bilingual experts translated the scale to ensure content validity. Factor analysis was employed to confirm the factor structure, and a polytomous item response theory model was used to examine the individual items and entire scale. The theory-based single-factor structure was confirmed using a Korean community sample, and measurement invariances were found across sex and age groups. In addition, the scale showed a moderate relationship with established measures of interest. Furthermore, item and categorical functioning were investigated using the polytomous Item Response Theory (IRT) model (i.e., the Generalized Partial Credit Model [GPCM]), identifying well-functioning (e.g., items 4, 5, and 6) and suboptimal (e.g., item 2) items. Additionally, the results suggest that the participants might not be able to meaningfully differentiate the original five-response categories. To the best of our knowledge, this is the first attempt to validate the Psy-Flex in Korea. We believe that the findings are of considerable value in facilitating our understanding of the scale and, more broadly, the construct of psychological flexibility.

这项研究检验了心理测量学最近开发的六项 Psy-Flex 在韩国社区样本中的特性。使用横断面设计，从 1059 名参与者收集了数据。三位双语专家翻译了量表，以确保内容的有效性。采用因子分析确定因子结构，并采用多级项目反应理论模型检验单个项目和整个量表。使用韩国社区样本证实了基于理论的单因素结构，并且发现了跨性别和年龄组的测量不变性。此外，该量表与既定的兴趣指标之间存在适度的关系。此外，使用多分项目反应理论（IRT）模型（即广义部分信用模型[GPCM]）研究项目和分类功能，识别功能良好的（例如，第 4、5 和 6 项）和次优（例如，第 2 项）项。此外，结果表明参与者可能无法有意义地区分最初的五种反应类别。据我们所知，这是在韩国验证 Psy-Flex 的首次尝试。我们相信，这些发现对于促进我们对量表以及更广泛的心理灵活性的构建的理解具有相当大的价值。