what is the experimental group

An experimental group is a group of participants in an experiment who are exposed to the independent variable under investigation. The independent variable is the variable that is being tested or manipulated by the researcher. The experimental group is compared to a control group, which is a group of participants who do not receive any experimental treatment. The control group provides a baseline against which any changes in the experimental group can be compared. Since experimental manipulation is the only difference between the experimental and control groups, any differences between the two can be attributed to the experimental manipulation rather than chance. In most cases, participants are randomly assigned to either a control or experimental group to ensure that the groups are identical except for manipulating the independent variable in the experimental group. Having multiple experimental groups enables researchers to vary different levels of an experimental variable and compare the effects of these changes to the control group and among each other.