The control group is defined as the group in an experiment or study that does not receive treatment by the researchers and is then used as a benchmark to measure how the other tested subjects do.
An example of a control group is the people in a clinical trial who do not get to try out the brand new drug that is being tested.
a group that serves as the control (noun) in a scientific experiment; specif., such a group that does not receive the substance, drug, treatment, etc. being tested
(plural control groups)
- (in an experiment) The group of test subjects left untreated or unexposed to some procedure and then compared with treated subjects in order to validate the results of the test.