How is a factor different from a response variable in an experiment?

In an experimental study, the distinction between a factor and a response variable lies in their roles regarding control and measurement.

• Factors: These are the variables of interest that the experimenter actively controls or manipulates. By setting specific levels or treatments for these factors, researchers investigate how they influence the outcome of the study.12
• Response Variable: Also known as the response, this is the variable that is measured at the end of the experiment. It represents the outcome being studied to see how it is affected by the controlled factors.12

For example, in a study testing the effect of different exercise programs on cholesterol levels, the exercise program is the factor (the variable being controlled), while the patient's final cholesterol level is the response variable (the outcome being measured).12