期刊
ORGANIZATIONAL RESEARCH METHODS
卷 11, 期 2, 页码 241-269出版社
SAGE PUBLICATIONS INC
DOI: 10.1177/1094428107300344
关键词
mediation; bootstrapping
In a three-path mediational model, two mediators intervene in a series between an independent and a dependent variable. Methods of testing for mediation in such a model are generalized from the more often used single-mediator model. Six such methods are introduced and compared in a Monte Carlo study in terms of their Type I error, power, and coverage. Based on its results, the joint significance test is preferred when only a hypothesis test is of interest. The percentile bootstrap and bias-corrected bootstrap are preferred when a confidence interval on the mediated effect is desired, with the latter having more power but also slightly inflated Type I error in some conditions.
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