ABA glossary
Undermatching
Definition
Responding that is less extreme than the reinforcement ratio predicts, so preference for the richer option is weaker than strict matching; the most common deviation.
Example from a session
An option gives 80% of reinforcers but receives only 65% of responses.
Can you spot undermatching in a scenario?
Practice BCBA B.23 with exam-style questions and instant feedback.