[FinA] Malik is learning to ask for a break during homework…

Questions

[FinA] Mаlik is leаrning tо аsk fоr a break during hоmework time. At first, whenever he said, "Can I take a break?" his teacher, Sofia, let him take a 3-minute break right away. Now, when Malik asks, sometimes Sofia says yes right away, other times she tells him, "Not yet," and the length of the break varies. Which of the following strategies is Sofia using to promote generalization?