分组随机试验的设计与分析

IF 2.3 3区 教育学 Q1 EDUCATION & EDUCATIONAL RESEARCH
Wei Li, Yanli Xie, Dung Pham, Nianbo Dong, Jessaca Spybrook, Benjamin Kelcey
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引用次数: 0

摘要

聚类随机试验(CRTs)通常用于评估教育干预措施的因果效应,整个聚类(如学校)被随机分配到治疗或对照条件中。本研究介绍了设计和分析两级(如学校内嵌套的学生)和三级(如学校内嵌套的教室内的学生)CRT 的统计方法。具体来说,我们利用分层线性模型(HLMs)来考虑同一分组内干预参与者的依赖性,估计教育干预的平均治疗效果(ATEs)和其他相关效果(如调节剂和中介效应)。我们展示了样本量规划和统计功率分析的方法和工具。此外,我们还讨论了设计和分析阶段常见的挑战和潜在的解决方案,包括省略一级聚类的影响、不遵从、异质方差、阻断、外部效度的威胁以及干预的成本效益。最后,我们将为 CRT 的设计和分析提供一些实用建议,并推荐更多读物。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Design and analysis of cluster randomized trials

Design and analysis of cluster randomized trials

Design and analysis of cluster randomized trials

Cluster randomized trials (CRTs) are commonly used to evaluate the causal effects of educational interventions, where the entire clusters (e.g., schools) are randomly assigned to treatment or control conditions. This study introduces statistical methods for designing and analyzing two-level (e.g., students nested within schools) and three-level (e.g., students nested within classrooms nested within schools) CRTs. Specifically, we utilize hierarchical linear models (HLMs) to account for the dependency of the intervention participants within the same clusters, estimating the average treatment effects (ATEs) of educational interventions and other effects of interest (e.g., moderator and mediator effects). We demonstrate methods and tools for sample size planning and statistical power analysis. Additionally, we discuss common challenges and potential solutions in the design and analysis phases, including the effects of omitting one level of clustering, non-compliance, heterogeneous variance, blocking, threats to external validity, and cost-effectiveness of the intervention. We conclude with some practical suggestions for CRT design and analysis, along with recommendations for further readings.

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来源期刊
Asia Pacific Education Review
Asia Pacific Education Review EDUCATION & EDUCATIONAL RESEARCH-
CiteScore
5.20
自引率
4.30%
发文量
64
期刊介绍: The Asia Pacific Education Review (APER) aims to stimulate research, encourage academic exchange, and enhance the professional development of scholars and other researchers who are interested in educational and cultural issues in the Asia Pacific region. APER covers all areas of educational research, with a focus on cross-cultural, comparative and other studies with a broad Asia-Pacific context. APER is a peer reviewed journal produced by the Education Research Institute at Seoul National University. It was founded by the Institute of Asia Pacific Education Development, Seoul National University in 2000, which is owned and operated by Education Research Institute at Seoul National University since 2003. APER requires all submitted manuscripts to follow the seventh edition of the Publication Manual of the American Psychological Association (APA; http://www.apastyle.org/index.aspx).
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