Questions tagged [simple-effects]

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How to interpret a significant effect present in a subset data but absent in the full data

My model has 3 predictors: Group (A vs. B) Condition (baseline vs. treatment) Memory (a continuous variable) The model gives an interaction between Condition and Group. I then tested the simple ...
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1answer
158 views

Main effect vs simple effect

In the following linear model: $y = \beta_0 +\beta_1 x_1 +\beta_2 x_2 + \beta_3x_1x_2 + \epsilon$ what are called $x_i$? The term $x_1x_2$ is the interaction. In ANOVA, $x_i$ are named "main ...
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188 views

Why are Simple Effects only used when the interaction is significant?

I have conducted a 2-way ANOVA and obtained a significant Main Effect in IV1 and IV2, but a non-significant interaction. Following that, I have analyzed IV1 using a test for Simple Effects and ...
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0answers
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Computing Simple Slopes for 3-Way Interaction in Multilevel Model

I have several significant 3-way interactions in a 2-level models (individuals nested in couples), and I am struggling with the computation of the simple slopes. Essentially, my categorical level-2 ...
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2answers
423 views

Interaction not significant, but one simple effect significant: linear mixed model with lmer() in R

Currently cross-posted at https://stackoverflow.com/questions/63492814/interaction-not-significant-but-one-simple-effect-significant-linear-mixed-mod because I wasn't sure which site was more ...