Separating the independent variable involved in the experimental hypothesis from the side effects associated with its effects. which is achieved with the help of special methodological procedures in a laboratory experiment.

In contrast to empirical experiments. where the independent variable is actually always a combination of factors. in the laboratory (or in scientific reality) is isolated. i.e., isolated. so that we can study its effect only on the dependent variable. the independent variable. with its conditions filtered out. allows us to formulate and test precise empirical hypotheses. Regarding the mechanisms of the behavior under study.