A researcher is studying a phenomenon that is commonly measured as a difference

Question

A researcher is studying a phenomenon that is commonly measured as a difference between the levels of IV1. Their theory proposes that manipulating a second IV (IV2), should cause a change to the size of the IV1 effect. If the theory is correct which outcome in a 2x2 design is the researcher most interested in?

(a) The absence of an interaction effect between IV1 and IV2

(b) The presence of a main effect for IV2

(c) The interaction effect between IV1 and IV2

(d) The presence of a main effect for IV1

Explanation / Answer

Answer. (d) . The presence of main effect for IV1

The researcher would interested in the study of the presence of main effect for IV1 as it is the hypothesis of the theory.

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