Experiments do not adequately control for third variables when:
A)participants are not randomly selected for study.
B)not enough levels of the independent variable are studied.
C)the manipulation actually causes changes in the dependent variable.
D)random assignment fails to create equivalent groups.

Question

Quizplus · Accepted Answer

Third variables are variables that are not being deliberately manipulated in the experiment but may influence the outcome. Random assignment is used to control for these variables by creating equivalent groups. If random assignment fails, then the control for third variables is not adequate.

Experiments Do Not Adequately Control for Third Variables When