A controlled research method undertaken in an artificial environment, frequently involving the manipulation of independent variables to determine their effect on dependent variables, with the intention of establishing cause-and-effect relationships. As an illustration, researchers might examine the impact of varying levels of stress on problem-solving abilities within a carefully controlled setting where external factors are minimized.
This method provides a high degree of control over extraneous variables, increasing the internal validity of the findings. This rigor allows researchers to confidently attribute changes in the dependent variable to the manipulated independent variable. Historically, it has served as a cornerstone of psychological research, contributing significantly to understanding fundamental processes such as learning, memory, and perception.