Which term best describes the procedure being tested in an experimental research?

The term "Intervention" best describes the procedure being tested in experimental research because it refers specifically to the action or treatment applied to participants in order to observe its effects. In experimental research, researchers manipulate one or more variables to determine how these changes affect other variables. This process is central to the research design, as it allows for the assessment of causality between the independent variable (the intervention) and the dependent variable (the outcome being measured).

In contrast, other terms do not directly refer to the tested procedure itself. "Control" typically refers to the group that does not receive the intervention, which is essential for comparison but does not encapsulate the action being studied. "Evaluation" describes the process of assessing outcomes or effects but is not synonymous with the intervention itself. "Analysis" pertains to the methods of interpreting data post-experiment and does not represent the procedure being implemented during the experimentation phase. Therefore, "Intervention" is the most accurate choice for describing the procedure being tested.