Lecture 9: Moderation in ANOVA (Alternative) Flashcards
(25 cards)
What statistical method is used to test moderation in ANOVA?
Interaction effects
What does ANOVA compare?
Means across categorical IVs
What method should be used instead of ANOVA if the IV is continuous?
Regression
What are the two types of variance in ANOVA?
Between-groups and within-groups
What does the F-ratio in ANOVA represent?
Systematic variance divided by error variance
What does a main effect represent?
The average effect of one IV
What does an interaction effect test for?
Whether the effect of one IV depends on another IV
How is moderation represented in ANOVA?
As an interaction effect
What does a moderator do in a relationship between variables?
Changes the strength or direction of the effect
What preference did disease primes lead to in the study?
Masculine faces
What preference did scarcity primes lead to in the study?
Feminine faces
What variable moderated the effect of facial masculinity on attractiveness?
Priming condition
What are marginal means used to interpret?
Main effects
What indicates an interaction in an interaction plot?
Non-parallel lines
Can interactions exist without main effects?
Yes
Are main and interaction effects dependent or independent?
Independent
What type of test detects whether any group differences exist in ANOVA?
Omnibus test
What test is used after finding significant main effects?
Pairwise comparisons or contrasts
What test is used after finding significant interaction effects?
Simple effects analysis
In between-subjects designs, what error term is used in follow-ups?
The same as in the omnibus test
In within-subjects designs, what test is used for follow-ups?
One-way ANOVA
What test checks the sphericity assumption in within-subjects designs?
Mauchly’s test
What correction is used if sphericity is violated?
Greenhouse-Geisser correction
What is moderation equivalent to in factorial ANOVA?
Interaction
