If you are interested in determining whether fatigue causes negative mood, you would need to conduct a(n):
A) interview.
B) survey.
C) experiment.
D) observational study.

Question

Quizplus · Accepted Answer

In order to determine causality, an experiment is necessary. In this case, the independent variable would be the level of fatigue (which would be manipulated), and the dependent variable would be negative mood (which would be measured). By randomly assigning participants to a fatigue or control condition, and then measuring their negative mood levels, researchers could determine whether fatigue causes negative mood.

If You Are Interested in Determining Whether Fatigue Causes Negative