However, after stopping the conditioning, sleep time returned to the average range of baseline and conditioning time. This is the process called extinction. Extinction indicates that when reinforcement/punishment stops, the behavior will return to baseline. This phenomenon demonstrates that conditioning is effective over a short period of time. Conclusion In the experiment to modify sleep procrastination using operant conditioning with positive reinforcement, the effectiveness of the conditioning changed during the conditioning period. This shows that the stimulus is effective for me to some extent. But the response data also show that the extinction effect of operant conditioning disrupts the outcome of the experiment. In trying to reduce disruption, I should extend the duration of the experiment to ensure that the conditioning can work better. In conclusion, the experiment works well by choosing positive reinforcement and