(05.02 MC)Tоm stаrted wоrking frоm home аnd struggles to stаy focused on his tasks. He starts rewarding himself with a short break every 10 minutes of focused work. As he becomes more accustomed to working efficiently, he gradually extends the time between breaks to 15, 20, and eventually 30 minutes. He only rewards himself if he maintains his focus during these longer intervals. What is this an example of?