Group designs can be valuable to evaluations, particularly if the goals of the evaluation are to explain, predict, or claim causal inferences. Many of these methodologies involve using either control or comparison groups. What makes these two groups different?

Question

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The main difference between control and comparison groups is that control groups are subjected to the same conditions as the treatment group except for the variable being tested while comparison groups are used to compare outcomes between different groups. Both control and comparison groups require random assignment to ensure validity and reliability, but this factor alone does not distinguish them from each other. Diversity of demographics and size may vary between groups but are not defining characteristics of either control or comparison groups.

Group Designs Can Be Valuable to Evaluations, Particularly If the Goals