A research approach involves incrementally modifying the performance levels required to earn reinforcement. It starts with an initial criterion, and once the participant’s behavior consistently meets that standard, the criterion is systematically changed to a new, typically more demanding, level. This process continues across multiple phases, each with a different performance threshold. For example, a student might initially be required to complete 5 math problems correctly to earn a reward. Once the student consistently achieves this, the requirement increases to 7 problems, then 9, and so on. The design’s effect is demonstrated if behavior changes in accordance with each changing performance standard.
This methodology is beneficial because it allows for the evaluation of treatment effects within a single subject, minimizing the need for control groups. The gradual nature of the shifting criteria also makes it suitable for interventions that aim for incremental progress. Historically, it has been utilized in various fields, including education, behavioral psychology, and rehabilitation, providing researchers with a flexible and robust method for assessing the impact of interventions on behavior modification.
