Intact groups often pose a problem when designing experiments because
A) intact groups cannot be randomly selected from a defined population.
B) intact groups cannot be assigned to control treatments.
C) administrators are usually concerned that experiments may weaken the the groups' cohesiveness.
D) individuals within an intact group cannot be randomly assigned to the experimental and control groups.

Question

Quizplus · Accepted Answer

Intact groups pose a problem because individuals within these groups cannot be randomly assigned to experimental and control groups, which is crucial for eliminating selection bias and ensuring the validity of the experiment.

Intact Groups Often Pose a Problem When Designing Experiments Because