Which of the control techniques has the most power to insure that extraneous variables do not have differential effects on the different groups in the experiment?
A) Random assignment
B) Matching
C) Counterbalancing
D) Precision matching

Question

Quizplus · Accepted Answer

Random assignment is the most powerful technique for controlling extraneous variables because it ensures that each participant has an equal chance of being assigned to any group, thus balancing out unknown factors across groups.

Which of the Control Techniques Has the Most Power to Insure