Madison wants to examine the effect of a defendant's appearance on judgment of guilt for a crime. She has participants read an identical account of a crime except for the defendant's appearance. A group of high school students receive a description of an attractive defendant while a group of senior citizens receive a description of an unattractive defendant. Both groups are then asked to rate the defendant's guilt on a 7-point scale. A major confound in Madison's experiment is
The age of the participants

The age of the participants

Explanation:

Confound is described as one of the different methodologies that are responsible for creating confounding variables. Although, it can often threat the results of particular research because of its relationship with that of the independent variable as well as the dependent variable.

A confound is a variable that an experimenter intentionally doesn't control i.e, the extraneous variable and often influence the findings of the research.

In the question above, A major confound in Madison's experiment is the age of the participants.