ABA glossary
Statistical regression
Also called regression to the mean
Definition
A threat to internal validity: extreme scores tend to move back toward a person's typical level on later measurement, whether or not anything was done.
Example from a session
A client is enrolled after an unusually bad week, and behavior improves partly by itself.
Can you spot statistical regression in a scenario?
Practice BCBA D.3 with exam-style questions and instant feedback.