Which of the control techniques has the most power to insure that unidentified, extraneous variables do not have differential effects on the different groups in the experiment?
A) randomization
B) matching
C) counterbalancing
D) precision matching

Question

Quizplus · Accepted Answer

Randomization is the most powerful control technique for ensuring that unidentified, extraneous variables do not have differential effects on different groups in an experiment. By randomly assigning participants to groups, each group is likely to be similar in all respects, including those variables that have not been identified or measured, thus minimizing the potential for these variables to bias the results.

Which of the Control Techniques Has the Most Power to Insure