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Analyzing and Visualizing Interactions in SAS
This workshop introduces methods of analyzing interactions (moderated effects) in regression models: calculating, comparing and graphing simple effects and slopes. Specifically, we emphasize the use of proc plm and the lsmeans and estimates statements in SAS in conjunction with a solid understanding of the regression equation. Examples include two- and three-way interactions in linear regression and two-way interactions in logistic regression. Although the concepts of moderation and interaction are reviewed in the seminar, some background in regression and moderation is recommended.