A common control procedure in a group design is
A) random assignment of subjects to groups.
B) alternating assignment of subjects to groups.
C) recording a one-week baseline period.
D) recording a two-week baseline period.

Question

Quizplus · Accepted Answer

Random assignment of subjects to groups is a common control procedure in group design because it helps ensure that each group is comparable at the start of the experiment, reducing the impact of confounding variables.

A Common Control Procedure in a Group Design Is