In an experiment to find out if talking on a cell phone while driving affects one's driving performance, one's familiarity with the car used in the experiment would be
A)the independent variable.
B)a control variable.
C)an extraneous variable.
D)the dependent variable.

Question

Quizplus · Accepted Answer

Familiarity with the car is an extraneous variable because it is not the main focus of the study but could influence the results if not controlled.

In an Experiment to Find Out If Talking on a Cell