What does a control group do in experimental research?

In experimental research, a control group serves as a baseline for comparison to the experimental group that receives the intervention. This baseline is essential for establishing the effectiveness or impact of the intervention being tested. By comparing outcomes between the control group and the experimental group, researchers can determine whether any observed changes are attributable to the intervention itself or if they might have occurred due to other factors.

This comparative approach enhances the validity of the research findings and allows for a clearer understanding of the intervention’s effects. It essentially helps to isolate the variable being studied, providing robust evidence that supports or refutes the hypothesis. Hence, the role of the control group is critical for drawing accurate conclusions from experimental research.