031909homework - Homework due Name 1 Define acquisition and...

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Homework due 3/19/09 Name ____________________________________ 1. Define acquisition and extinction. What causes each? 2. What are some unlearned biological reinforcers? What is a powerful learned reinforcer that motivates much of human behavior? Which are there more of, biological or nonbiological reinforcers? 3. Give an example of how the hedonic value of a reinforcer (ie whether it is experienced as positive or negative) can vary according to the physiological state of the organism. 4. Describe Freud's drive-reduction theory of reinforcement. Identify the problems with this theory. 5. Why did Olds and Milner electrically stimulate the reticular activating system. What did they serendipitously find?
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6. What behavioral paradigm did Olds and Milner “invent” to demonstrate that stimulation of certain areas of the rat brain is rewarding. 7. Draw a picture of a primitive vertebrate brain and label the areas where electrical stimulation has been found to be rewarding. What is the common theme that ties all these areas together 8.
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