An empirically based understanding of the factor structure of the restricted and repetitive behaviors (RRB) domain is a prerequisite for interpreting studies attempting to understand the correlates and mechanisms underpinning RRB and for measurement development. Therefore, this study aimed to conduct a systematic review and meta-analysis of RRB factor analytic studies. Sets of meta-analyses were performed to examine (a) the factor structure of individual RRB instruments, (b) associations between RRB subdomains across instruments, and (c) the association between RRB factors and other variables. Searches for peer-reviewed articles evaluating the factor structure of the RRB domain were performed in PsycINFO (Ovid), Medline (Ovid), and Embase (Ovid). No age, measurement, or informant-type limits were imposed. Quality and risk of bias for individual studies were assessed using relevant COSMIN sections. Among the 53 studies retained for review, 41 examined RRB factor structures among individuals with autism spectrum disorder (ASD) and 12 among non-ASD samples. Meta-analysis of factor correlations provided evidence that the RRB domain encompasses the following eight specific factors: repetitive motor behaviors, insistence on sameness, restricted interests, unusual interests, sensory sensitivity, and repetitive, stereotyped language. Although interrelated, RRB factors were distinct, showing a unique pattern of associations with demographic, cognitive, and clinical correlates. Meta-analyses of the associations between RRB factors and specific correlates, specifically adaptive functioning and communication impairments, should be considered preliminary due to the limited number of studies. Despite limitations, this review provides important insights into the factor structure of the RRB domain and highlights critical conceptual, measurement, and methodological limitations of the current research that will need to be addressed in order to improve our understanding of RRB.

对限制性和重复性行为 (RRB) 领域的因子结构进行基于经验的理解是解释研究的先决条件，这些研究试图了解支撑 RRB 的相关性和机制以及测量开发。因此，本研究旨在对RRB因子分析研究进行系统回顾和荟萃分析。进行了多组荟萃分析，以检查（a）各个 RRB 工具的因子结构，（b）跨工具的 RRB 子域之间的关联，以及（c）RRB 因子与其他变量之间的关联。在 PsycINFO (Ovid)、Medline (Ovid) 和 Embase (Ovid) 中搜索评估 RRB 域因子结构的同行评审文章。没有施加年龄、尺寸或线人类型限制。使用相关 COSMIN 部分评估个别研究的质量和偏倚风险。在保留供审查的 53 项研究中，41 项研究了自闭症谱系障碍 (ASD) 个体的 RRB 因子结构，12 项研究了非 ASD 样本。因素相关性的荟萃分析提供的证据表明，RRB 域包含以下八个特定因素：重复的运动行为、坚持相同、受限的兴趣、不寻常的兴趣、感官敏感性以及重复的刻板语言。尽管相互关联，RRB 因素却截然不同，显示出与人口统计学、认知和临床相关性的独特关联模式。由于研究数量有限，应考虑对 RRB 因素与特定相关因素（特别是适应性功能和沟通障碍）之间的关联进行初步分析。 尽管存在局限性，这篇综述提供了对 RRB 领域因素结构的重要见解，并强调了当前研究中需要解决的关键概念、测量和方法学局限性，以提高我们对 RRB 的理解。