@article{ref1,
title="Post-hoc probing of significant moderational and mediational effects in studies of pediatric populations",
journal="Journal of pediatric psychology",
year="2002",
author="Holmbeck, Grayson N.",
volume="27",
number="1",
pages="87-96",
abstract="Objective: To provide examples of post-hoc probing of significant moderator and mediator effects in research on children with pediatric conditions.Methods: To demonstrate post-hoc probing of moderational effects, significant two-way interaction effects (dichotomous variable × continuous variable; continuous variable × continuous variable) were probed with regressions that included conditional moderator variables. Regression lines were plotted based on the resulting regression equations that included simple slopes and y-intercepts. To demonstrate probing of mediational effects, the significance of the indirect effect was tested (i.e., the drop in the total predictor → outcome effect when the mediator is included in the model), using Sobel's (1988) equation for computing the standard error of the indirect effect.Results: All significant moderator and mediator effects are presented in figure form.Conclusions: The computational examples demonstrate the importance of conducting post-hoc probes of moderational and mediational effects.<p /><p>Language: en</p>",
language="en",
issn="0146-8693",
doi="10.1093/jpepsy/27.1.87",
url="http://dx.doi.org/10.1093/jpepsy/27.1.87"
}