Imagine That You Want to Improve a Distractible Child's Ability

Imagine that you want to improve a distractible child's ability to sit still and listen in class. Which one of the following procedures illustrates how you might use shaping to do so?

A) Explain the purpose of sitting quietly before reinforcement begins.
B) Reinforce the child for sitting still on some occasions, but not on others.
C) Reinforce the child for sitting still and listening for only a minute, then for progressively longer and longer periods of time.
D) Frequently change the specific consequence you use to reinforce sitting still-and-listening behavior (e.g., you might use candy a few times, then praise, then privileges, and so on) .