有中介的调节变量和有调节的中介变量

Mediated Moderator and Moderated Mediator

研究了有中介的调节效应模型和有调节的中介效应模型,两种模型都涉及到中介变量和调节变量。分别讨论了这两种模型的分析方法,两者基本上都是按中介效应模型的分析步骤,但其中都有一步要做调节效应的分析。还讨论了同时包含有中介的调节变量和有调节的中介变量的混合模型。最后,作为示范例子,用混合模型分析儿童行为对同伴关系的影响,结果发现,如果混合模型中的调节都设定是线性的,那么调节变量对因果关系是二次调节。

We presented two causal models that include either a mediated moderator or a moderated mediator. The ＂mediated moderator＂ model focuses on the moderating effect and the ＂moderated mediator＂ model focuses on the mediating effect. Both models can be analyzed using procedures similar to those for testing mediating effects. Each procedure, however, also consists of an extra step to test moderating effects. These procedures are summarized below： The moderating effect of U on the relation between Y and X is mediated by W： （ 1 ） Regress Y on X, U and UX. A significant coefficient associated with UX implies that U is the moderator of the relation between Y and X. （2） Regress W on X, U and UX and look for a significant coefficient associated with UX. （3） Regress Y on X, U, UX and W. A significant coefficient associated with W suggests the mediating effect of W on the moderated （by U） relation between X and Y. Moreover, the moderated effect of U on the relation between Y and X is completely mediated by W if the coefficient associated with UX is not significant. The mediating effect of W on the relation between Y and X is moderated by U： （1） Regress Y on X, U and look for a significant coefficient associated with X; （2） Regress W on X, U and look for a significant coefficient associated with X; （3） Regress Y on X, U and W, and look for a significant coefficient associated with W; （Steps 1 -3 are used to test the mediating effect of W on the relation between Y and X）. （4） Regress Y on X, U, W and UW. A significant coefficients associated with UW suggests that the mediating effect of W on the relation between X and Y is moderated by U. In addition to these two models, we also presented a mixed model including both a mediated moderator and a moderated mediator. Using an example to illustrate the mixed model, we showed that Teacher Liking as a mediator on the relation between students＇Antisocial Behavior and Peer Acceptance was moderated by Perceived Authoritative Teachering, and that Perceived Authoritative Teachering as a moderator on the relation between Antisocial Behavior and Peer Acceptance was mediated by Teacher Liking. The relative size of the mediating effect in the mixed model was also computed. It was further demonstrated that the moderator of the mediated relation represented a quadratic effect, whereas other relations examined in the mixed model were linear effects.