Dunn et al. (2005) conducted an experiment of the relationship between exercise and depression. Participants were randomly assigned to either a low or a high intensity workout regime. Some were assigned to work out 3 days a week, while other participants worked out 5 days a week. Identify the independent variable(s) in this study.
A)Energy condition
B)Participants' interest in exercise and health conditions
C)Amount of exercise and frequency of exercise
D)Depression

Question

Quizplus · Accepted Answer

The independent variables in this study are the amount of exercise and the frequency of exercise, as participants were randomly assigned to either a low or high intensity workout regime and either 3 or 5 days a week of exercise. The other answer options (A, B, and D) are not independent variables in this study.

Dunn Et Al