题目内容
During this cycle the heartbeat increases, breathing becomes shallow, eyes move rapidly, muscles are relaxed, dreams are most vivid, and brain waves resemble those during waking. What stage is this?
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In the early 1900s, Ivan Pavlov, a famous Russian physiologist who did Nobel prize-winning research on digestion, conducted a marvelous experiment that demonstrated what has come to be called () .
() is a form of learning in which voluntary responses come to be controlled by their consequences.
() refers to the initial, momentary recording of information in our sensory systems.
() are assumed to be represented in our minds in some nonlinguistic form.
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