|Brian O'Connor||UBCO Psychology||UBCO|
All-in-one programs for exploring interactions in moderated multiple regression
O'Connor, B. P. (1998). All-in-one programs for exploring interactions in moderated multiple regression. Educational and Psychological Measurement, 58, 833-837.
Upon discovering an interaction in moderated multiple regression, users must conduct time-consuming simple slope analyses that are not performed by current statistical software programs. This paper describes SAS and SPSS programs that provide complete simple slope statistics and plots all in one job run. Programs are available for two and three-way interactions, and for continuous and categorical moderators.
The programs were revised in May, 2005.
Click on a program to view its contents. Copy and paste into a file.
|Simple-2way||Simple-2way||For interactions between two continuous
predictors, or for interactions between a
dichotomous IDV and a continuous moderator
|Simple-3way||Simple-3way||For 3-way interactions with two continuous
moderators and a continuous or dichotomous IDV
|Simple-2grps||Simple-2grps||For interactions between a continuous IDV
and a 2-category moderator
|Simple-3grps||Simple-3grps||For interactions between a continuous IDV
and a 3-category moderator
|Simple-4grps||Simple-4grps||For interactions between a continuous IDV
and a 4-category moderator
|Simple-5grps||Simple-5grps||For interactions between a continuous IDV
and a 5-category moderator
|Simple-6grps||Simple-6grps||For interactions between a continuous IDV
and a 6-category moderator
All of the programs contain commands (near the top) that generate artificial data that can be used for trial runs. These commands should of course be removed for analyses using real data.
Thanks to Asier R. Larrinaga, Dept. de Biolox'a Celular e Ecolox'a, A Coru–a, Spain, for help with Simple-6grps.sps program and with the simultaneous regions of significance computations.
Thanks to Maarten Vissers, Dept. of Communication Studies, University of Twente, The Netherlands, for help with the simultaneous regions of significance computations.
For more information
on the programs, see the Program
Click here for an R package named SIMPLE.REGRESSION that performs the same analyses as the above programs (plus additional analyses) and that is easier to use.
Brian P. O'Connor
Department of Psychology
University of British Columbia - Okanagan
Kelowna, British Columbia, Canada