What determines the amount of change at each step in a changing-criterion design?

A child diagnosed with autism engages in hand flapping almost continuously at home, day care and school. An intervention is devised to alleviate this challenging behavior. Which type of experimental design would be BEST?

Jim's teacher has taught him to say, "Hello, how are you?" and when he does this, she delivers praise. Now Jim says this whenever he meets anyone, and some people say,
"Fine, how are you?" What is the natural consequence for Jim's behavior?

In the past, Parnelli consistently drove at high speeds on city streets. However, he was pulled over and had to immediately pay a very expensive fine. Afterward, Parnelli very seldom drove at high rates of speed. Which of the following might account for the effect of the lost money resulting from paying the fine?

If B is behavior, R is reinforcement, and 1 and 2 are the alternatives of a concurrent schedule, then would imply that the: