期刊
EDUCATIONAL PSYCHOLOGY REVIEW
卷 33, 期 2, 页码 713-737出版社
SPRINGER/PLENUM PUBLISHERS
DOI: 10.1007/s10648-020-09549-7
关键词
Single-case intervention research; Randomized multiple-baseline designs and analyses; Randomization tests of slopes and variability
This study compared various randomization test procedures in assessing different types of intervention-based effects in single-case educational intervention research, and proposed an alternative measure of variability that is more sensitive to detecting changes.
Previous simulation studies of randomization tests applied in single-case educational intervention research contexts have typically focused on A-to-B phase changes in means/levels. In the present simulation study, we report the results of two multiple-baseline investigations, one targeting between-phase changes in slopes/trends and the other targeting between-phase changes in variability. For each of these measures, we examine the comparative type I errors and powers of several randomization test procedures that have previously appeared in the literature. In so doing, we propose an alternative measure of variability that is more sensitive to detecting between-phase change than is the variance itself. We conclude by providing a summary table of recommended randomization test procedures for assessing different types of intervention-based effects associated with level, trend, and variability.
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