When the goal of evaluation is to compare alternative programs, it may be preferable to:
A) Randomize whole groups, not individuals, to different groups
B) Randomize individuals, not whole groups, to different groups
C) Randomly sample small groups from a small population
D) Make sure to have a small sample size
E) Only use this approach when studying small businesses and individuals

Question

Quizplus · Accepted Answer

Randomizing whole groups, rather than individuals, to different groups is often preferable when comparing alternative programs because it helps to minimize contamination across groups. This approach, known as cluster or group randomization, is particularly useful when the intervention is delivered at the group level or when interactions within groups could affect the outcome.

When the Goal of Evaluation Is to Compare Alternative Programs