What describes any aspect of the experimental setting that must be held constant to prevent unintended environmental variation?

• A. Explanatory Fiction
• B. Generalized Behavior Change
• C. Extraneous Variable
• D. Functional Relation

Answer: (C)

The idea being tested is about keeping the environment stable so the study’s results aren’t influenced by outside factors. An extraneous variable is any aspect of the experimental setting other than the independent variable that could affect the dependent variable. If these factors vary, they can confound the results, making it unclear whether changes in behavior come from the manipulation of the IV or from uncontrolled environmental aspects. By holding extraneous variables constant (or balancing them across conditions), you preserve internal validity and can attribute observed effects to the intended manipulation. Examples include keeping the same room conditions, time of day, or experimenter behavior across sessions. The other terms don’t fit this idea: an extraneous variable is not about a pattern of behavior across settings, nor about a specific functional relationship, and “explanatory fiction” isn’t a standard concept in this context.