The best way I think I can understand response deprovation hypothesis is as follows:
There will always be a time when you are really sick, or stuck in bed from and injury or in recovery. During these times you can go days to even months without being allowed to do anything, not even the stuff you don’t necessarily enjoy. You can’t dress yourself, can’t do the dishes, can’t walk around, can’t clean the house…can’t do anything at all really. Even if you aren’t in pain or suffering much, bedrest is hell. In this senario you are experiencing response deprivation. Your rate of responding is being force to go below your baseline. When you finally are allowed up and about, you will be happy just to have the opportunity to do the dishes or laundry or take out the garbage. The opportunity to perform those previously deprived responses becomes its own reinforcer.