What does the experimental method involve?

What does the experimental method involve?

• A. Observing behavior without intervention.
• B. Manipulating an independent variable and measuring its influence on a dependent variable.
• C. Conducting interviews.
• D. Administering only surveys.

Answer: (B)

The experimental method tests cause-and-effect by actively changing one variable and seeing how it influences another. You manipulate the independent variable and measure the resulting changes in the dependent variable, ideally with random assignment and a control condition so that differences can be attributed to the manipulation rather than other factors. This combination of intentional manipulation and measurement of outcome is what gives experiments their power to infer causation. Other approaches described—simply watching behavior without intervening, collecting self-report data through interviews or surveys—do not involve deliberately altering a variable to test its effect, so they’re not experimental. They can describe or relate factors, but they don’t establish causal links in the same way.

The experimental method tests cause-and-effect by actively changing one variable and seeing how it influences another. You manipulate the independent variable and measure the resulting changes in the dependent variable, ideally with random assignment and a control condition so that differences can be attributed to the manipulation rather than other factors. This combination of intentional manipulation and measurement of outcome is what gives experiments their power to infer causation.

Other approaches described—simply watching behavior without intervening, collecting self-report data through interviews or surveys—do not involve deliberately altering a variable to test its effect, so they’re not experimental. They can describe or relate factors, but they don’t establish causal links in the same way.