Experimental Design and Power for Moderation in Multisite Cluster Randomized Trials
Experimental Design and Power for Moderation in Multisite Cluster Randomized Trials
复制标题
多站点集群随机试验中的实验设计和调节能力
DOI:
10.1080/00220973.2023.2226934
复制
发表时间:
2023
期刊:
影响因子:
--
通讯作者:
Spybrook, Jessaca
中科院分区:
文献类型:
--
作者:
Dong, Nianbo;Kelcey, Benjamin;Spybrook, Jessaca
Multisite cluster randomized trials (MCRTs), in which, the intermediate-level clusters (e.g., classrooms) are randomly assigned to the treatment or control condition within each site (e.g., school), are among the most commonly used experimental designs across a broad range of disciplines. MCRTs often align with the theory that programs are delivered at a cluster-level (e.g., teacher professional development) and provide opportunities to explore treatment effect heterogeneity across sites. In designing experimental studies, a critical step is the statistical power analysis and sample size determination. However, the statistical tools for power analysis of moderator effects in three-level MCRTs are not available. In this study, we derived formulas for calculating the statistical power and the minimum detectable effect size difference (MDESD) with confidence intervals for investigating the effects of various moderators in three-level MCRTs. We considered the levels of the moderators (level-1, −2, and −3), the scales of the moderators (binary and continuous), and random and nonrandomly varying slopes of the (moderated) treatment effects. We validated our formulas through Monte Carlo simulations. Finally, we conclude with directions for future work.
登录
查看更多内容
影响因子:
7.6
作者:
BARON, RM;KENNY, DA
通讯作者:
KENNY, DA
影响因子:
1.8
作者:
S. Konstantopoulos
通讯作者:
S. Konstantopoulos
DOI:
10.1080/00220973.2016.1220911
发表时间:
2017
期刊:
The Journal of Experimental Education
影响因子:
--
作者:
Ben Kelcey;Jessaca K. Spybrook;Geoffrey Phelps;Nathan D. Jones;Jiaqi Zhang
通讯作者:
Jiaqi Zhang
DOI:
10.5964/meth.4003
发表时间:
2021-06-01
影响因子:
3.1
作者:
Dong, Nianbo;Spybrook, Jessaca;Bulus, Metin
通讯作者:
Bulus, Metin
影响因子:
3.5
作者:
Reinke, Wendy M.;Herman, Keith C.;Dong, Nianbo
通讯作者:
Dong, Nianbo