How Did Scientists Realize They'd Been Stimulating the Part of a Rats

question 57

Multiple Choice

How did scientists realize they'd been stimulating the part of a rats brain in an area that made the rat "feel" good?

• A) The rat kept behaving in such a way as to repeat the stimulus over and over, no matter what other activities were offered.
• B) The rat would twitch its whiskers in response to the stimulus, which is how rats communicate to other rats that something is good.
• C) Electrical stimulation in any part of a rats brain caused it to try to behave in such way as to repeat the stimulation, so it must have "felt" good.
• D) When rats were given a choice between the stimulus and a piece of their favorite food, they couldn't decide what to do and so did nothing.
• E) The rats were trained to push a lever when they "felt" good and they did this in response to particular brain stimulations.

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