Fast Interaction (fastInteraction) is now a package for R!
Fast Interaction is free software that conducts regression analyses to determine if two continuous variables interact to predict a criterion variable. Fast Interaction automatically mean centers the predictor variables and creates the corresponding product term predictors. Results are presented in a table and a 2-D/3-D graph. Simple-slope lines are calculated and displayed in the context of the 3-D surface.
Development version and documentation is presented on GitHub, see here:
