Keller has individuals run on a treadmill for 0, 15, or 30 minutes and then measures their self-reported mood. In this hypothetical study, the independent variable is:
A) the self-reported mood.
B) the individuals who run for 15 or 30 minutes.
C) the individuals who run for 0 minutes.
D) the number of minutes individuals run on the treadmill.

Question

Quizplus · Accepted Answer

The independent variable is the variable that is being manipulated or controlled in the study, and in this case, it is the number of minutes individuals run on the treadmill. The self-reported mood is the dependent variable, meaning that it is being measured and affected by the independent variable. The options of individuals who run for 0, 15, or 30 minutes are just different levels or conditions of the independent variable, and not the independent variable itself.

Keller Has Individuals Run on a Treadmill for 0, 15