________ refers to an extraneous variable that occurs when test units with extreme scores move closer to the average score during the course of the experiment.
A)Instrumentation
B)Statistical regression
C)Selection bias
D)None of the above

Question

Quizplus · Accepted Answer

Statistical regression refers to the phenomenon where test units with extreme scores move closer to the average score during the course of the experiment. This can happen due to natural fluctuations in the data and not necessarily due to any treatment effect. It is important for researchers to be aware of this when interpreting their results.

________ Refers to an Extraneous Variable That Occurs When Test