John was taught by his teacher to say, "Hello" when greeting people. Now when he meets people he not only says "hello," but also says: "hi," "good to see you" and "hey there." John's behavior change is an example of:

The correct answer would be, Response Generalization.

Explanation:

In simple words, Response Generalization is the spreading of the effects of a behavior which strengthen the contingency to other responses that are similar to the target response. Response Generalization is actually the possibility or occurrence of the similar response or behavior which occurs once.

So if John says some more words to greet people when he meets them, other than what he was taught by his teacher, his behavior change is the example of Response Generalization. For example, if he is taught to say Hello while greeting people, he can continue this behavior by saying Hi, good to see you, hey there, etc. This is response generalization.

Response Generalization

Explanation:

Also called stimulus generalization. the act or process of responding to a stimulus similar to but distinct from the conditioned stimulus. Also called response generalization. the act or process of making a different but similar response to the same stimulus.