A Changing Criterion Design is a single-subject research design used to evaluate the effects of an intervention on behaviorBehavior refers to any activity or action that living organ... by gradually changing the criterion for reinforcement over time. As the individual’s behavior improves or changes, the criterion for earning reinforcement is adjusted incrementally, allowing the practitioner to assess whether the behavior is following the intended pattern of change. This design is especially useful when trying to shape a behavior to meet specific, measurable goals.
Example:
A behavior analyst is working with a student to increase the number of math problems completed during a study session. The goal is for the student to complete 20 problems in 30 minutes.
- First Criterion: The student must complete 5 problems to earn reinforcement (e.g., extra free time).
- Second Criterion: Once the student consistently completes 5 problems, the criterion is increased to 10 problems for reinforcement.
- Third Criterion: The student must now complete 15 problems to earn reinforcement.
- Final Criterion: The student must complete 20 problems in 30 minutes to meet the final goal and receive reinforcement.
The changing criterion allows for small, achievable steps toward the target behavior, providing reinforcement at each stage.