Whenever the repeated-measures design is used
A) the same subjects are used as their own controls
B) there should be a positive correlation between the pre and post scores
C) the researcher is using the post-facto method
D) both a and b, but not c

Question

Quizplus · Accepted Answer

In a repeated-measures design, the same subjects are used in all conditions of the experiment, effectively serving as their own controls, which often leads to a positive correlation between their pre-test and post-test scores. This design does not inherently involve the post-facto method, which is a retrospective, observational study design.

Whenever the Repeated-Measures Design Is Used