Definitions for "Experimental group"
In an experiment, the group receiving the treatment under study; any changes in these people are compared with changes in the control group. (17)
the subjects in an experiment who are exposed to the experimental condition of interest. (47)
In an experiment, the experimental group is the group of subjects (people or objects) that undergo the treatment or factor being studied. The experimental group exists in the same conditions as the control group. In an experiment on how plants react to limited light, the control plant and the experimental plant would receive the same amount of water and plant food. However, the experimental plant would sit in a windowless room to keep out sunlight, while the control plant would sit by a window and receive normal levels of light.