What Is the Difference Between Main Effect and Interaction Effect

question 9

Multiple Choice

What is the difference between main effect and interaction effect?

• A) A main effect is when you look at differences within both IVs at the same time, whereas an interaction effect occurs if the differences in one IV change depending on the other IV.
• B) A main effect occurs if the differences in one IV change depending on the other IV, whereas an interaction effect is when you look at differences across one IV, whilst entirely ignoring the variance explained by the other IV.
• C) A main effect is when you look at differences across one IV, whilst entirely ignoring the variance explained by the other IV, whereas an interaction effect occurs if the differences in one IV change depending on the other IV.
• D) A main effect is when you look at differences across one DV, whereas an interaction effect occurs when you look at differences across two DVs.

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