In experimental research on humans, the independent variable is
A) some form of stimulus presented to the subjects
B) under the full, active control of the experimenter
C) the potential causal half of the cause-and-effect relationship
D) all of these

Question

Quizplus · Accepted Answer

The independent variable is a variable that is manipulated by the experimenter to observe its effect on the dependent variable. It is under the full, active control of the experimenter and is considered the potential causal half of the cause-and-effect relationship. It is typically a form of stimulus presented to the subjects. Therefore, all of these options (stimulus, control, causal part) correctly describe the independent variable in experimental research on humans.

In Experimental Research on Humans, the Independent Variable Is