Kathy wants to know if using video examples in her classes will help to improve student learning.Kathy decides to show students in one section of her General Psychology class videos to supplement the material and students in the other section of her General Psychology class are not shown videos.Kathy then compares tests scores between the two classes to see if the videos increased student learning.However, before making the comparison, Kathy decides not to use scores from students who are repeating the course.What disadvantage of a between subjects design does Kathy avoid by not including students who are repeating the course?

Question

Quizplus · Accepted Answer

By not including students who are repeating the course, Kathy avoids the practice effect, where the repeated exposure to the material could influence their test scores and confound the results.

Kathy Wants to Know If Using Video Examples in Her