Hugo has learned to fear the bell on his phone because every time the phone rings, a prank caller starts shouting at him. He now finds himself fearful of other bells, like bicycle bells and doorbells. Hugo is affected by stimulus ____.?

According to Kübler-Ross's stages of dying, which of the following stages is most likely characterized by a person thinking that his or her diagnosis is wrong?

A) Bargaining B) Denial C) Depression D) Acceptance

Artificial language experiments on dolphins have indicated that they:

A) ?can be taught rudimentary grammar. B) ?can be taught sophisticated grammar. C) ?are incapable of demonstrating stimulus enhancement. D) ?can be taught only a primitive form of stimulus enhancement.