Questions tagged [simple-effects]
6 questions
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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 received a significant Simple effect at level 1 and a…
Hecealdor
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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 effects", but in regression I saw a paper mentioning that…
POC
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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 variable (couple is classified as…
Judy
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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 appropriate, but StackOverflow tends to get more traffic…
Meg
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How can I use the shared (global) error term in simple main effects for a mixed ANOVA in R?
I'm doing a mixed ANOVA with one within-subjects factor (time) and one between subjects factor (group). The dependent variable is score. When I find an interaction, I want to do simple main effects, i.e. test for an effect of time for each of the…
Floris
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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 effect of Condition within each level of Group, by…
chaoh
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