experimental group

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The group of participants in a clinical study who receive the actual drug or treatment being studied. See also controlled clinical trial.

A group of subjects exposed to the independent variable of an experiment (compare control group). Typically, the experimental group is treated with the independent variable to test an experimental hypothesis. The resultant effect, measured by a dependent variable, is compared with the control group. If a statistically significant difference (see statistical significance) is found between measurements of the dependent variable in the experimental and control groups, then the experimental hypothesis is supported. If there is no significant difference, the null hypothesis is supported.

A group of subjects that are exposed to the variable of a control experiment.