R Code for Simulations Testing Equal Variance Ratios and Moderator Effects

This webpage contains links to software resources that enable you to replicate simulations of the kind described in Smithson, M. (2012) A simple statistic for comparing moderation of slopes and correlations.

These include R code for the simulations involving categorical moderators, continuous moderators, SEMs for regression models and SEMs for correlation models. There is also code for the categorical moderator simulations with skew-normal data.

Moderator GLM simulations

SEM simulations
Categorical moderator, normal data Regression SEMs
Categorical moderator, skew-normal data Correlation SEMs
Continuous moderator, normal data

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