A researcher is conducting a study in which a treatment group is compared to a no-treatment control group. The treatment group is tested in the lab and the control group is tested in a classroom. Time is likely to be a threat to the internal validity of the study.

Question

Quizplus · Accepted Answer

The difference in testing environments (lab vs. classroom) rather than time is more likely to be a threat to the internal validity of the study, as it introduces a confounding variable related to the setting.

A Researcher Is Conducting a Study in Which a Treatment