A researcher is studying the effectiveness of two different anti-fungal medications on patients with toenail fungus. Study participants are randomized into two groups. A threat to validity with which the researcher will need to contend is

Question

Quizplus · Accepted Answer

Maturation refers to processes that occur within an individual research participant as a result of the passage of time, such as natural healing in the case of medication trials. Internal validity threat of history refers to environmental or external events that can affect the dependent variable in a study. Selection is a major threat to internal validity in evaluation studies where it may be participant motivation rather than the intervention itself that is responsible for any observed change in the dependent variable.

A Researcher Is Studying the Effectiveness of Two Different Anti-Fungal