Brian O'Connor | UBCO Psychology | UBCO |

** SIMPLE:**

** All-in-one programs for exploring interactions in moderated multiple regression**

Reference:

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.

SPSS: | SAS: | |

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 Notes.

Brian P. O'Connor

Department of Psychology

University of British Columbia - Okanagan

Kelowna, British Columbia, Canada

brian.oconnor@ubc.ca