In the context of confounding, what term describes a variable related to both the IV and DV?

In the context of confounding, what term describes a variable related to both the IV and DV?

• A. Mediator
• B. Moderator
• C. Confounder
• D. Covariate

Answer: (C)

A confounder is a variable that is related to both the exposure of interest and the outcome. Because it is linked to both, it can create a false impression of a relationship or mask a real one between the exposure and the outcome. For example, in a study examining a fitness program (the exposure) and cholesterol levels (the outcome), age could be a confounder since it influences who enrolls in the program and also affects cholesterol. If you don’t adjust for age, you might wrongly attribute changes in cholesterol to the program rather than to age. A mediator, on the other hand, lies on the causal path from exposure to outcome and explains how the exposure affects the outcome. A moderator changes the strength or direction of that effect depending on its level. A covariate is any measured variable entered into analysis to control variation; it may or may not be a confounder.

A confounder is a variable that is related to both the exposure of interest and the outcome. Because it is linked to both, it can create a false impression of a relationship or mask a real one between the exposure and the outcome. For example, in a study examining a fitness program (the exposure) and cholesterol levels (the outcome), age could be a confounder since it influences who enrolls in the program and also affects cholesterol. If you don’t adjust for age, you might wrongly attribute changes in cholesterol to the program rather than to age. A mediator, on the other hand, lies on the causal path from exposure to outcome and explains how the exposure affects the outcome. A moderator changes the strength or direction of that effect depending on its level. A covariate is any measured variable entered into analysis to control variation; it may or may not be a confounder.