Only an experiment can demonstrate cause-and-effect relationships between variables.

Question

Quizplus · Accepted Answer

This is because an experiment involves manipulating one variable (the independent variable) while keeping all other factors (the dependent variable and extraneous variables) constant, and then observing the effect on the dependent variable. This allows for the identification of cause-and-effect relationships between variables. Other research designs, such as correlational studies, can only identify relationships between variables but cannot establish causation.

Only an Experiment Can Demonstrate Cause-And-Effect Relationships Between Variables