The presence of extraneous factors in a study that affect the dependent variable and can decrease the internal validity of the study is called ______.
A) a second variable
B) a fourth variable
C) a sixth variable
D) a third variable

Question

Quizplus · Accepted Answer

The presence of extraneous factors that affect the dependent variable is commonly referred to as a third variable. This is because there are already two variables being studied (the independent variable and the dependent variable), and the third variable is an additional factor that may influence the results.

The Presence of Extraneous Factors in a Study That Affect