1. Noun
The group used as a baseline against which another group is compared.
A comparison group that does not receive the intervention or exposure being tested.
“The control group received the standard treatment.”
2. Phrase
The group used as a baseline for judging what changed because of the intervention.
A comparison group that does not receive the intervention or exposure being evaluated, or receives a standard alternative. Describe what the control group received and whether it was comparable at baseline.
“Changes in the control group were compared with those receiving the training.”
Describe what the control group received and whether it was comparable at baseline
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