If a researcher finds interaction between variable X and Y after controlling for Z, what would be the next step in the statistical analysis?
A) Disregard Z and select a new control variable.
B) Disregard X and select a new independent variable.
C) Disregard Y and select a new dependent variable.
D) Incorporate Z into the analysis.

Question

Quizplus · Accepted Answer

If there is evidence of interaction between variable X and Y after controlling for Z, the next step would be to incorporate Z into the analysis as a covariate. This way, the interaction effect can be properly interpreted and the role of Z in the relationship between X and Y can be fully understood. Disregarding Z and selecting a new control variable, independent variable or dependent variable would not address the issue of interaction and may lead to biased or inaccurate results.

If a Researcher Finds Interaction Between Variable X and Y