Five-year-old Trevor is emotionally withdrawn and refuses to communicate with anyone.To get him to speak,his teacher initially gives him candy for any utterance,then only for a clearly spoken word,and finally only for a complete sentence.The teacher is using the method of

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The teacher is using the method of shaping, which involves reinforcing successive approximations of a desired behavior until the behavior is fully learned. In this case, the teacher is reinforcing Trevor's utterances, then clear words, and finally complete sentences, gradually shaping his communication skills.

Five-Year-Old Trevor Is Emotionally Withdrawn and Refuses to Communicate with Anyone.To