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David is taking a class about learning and motivation and he has to work in the laboratory two times a week teaching a rat to press a bar. The cage that he uses allows David to control the reinforcement and punishment that the rat receives. The name for this device used for investigating learning in animals is called a:__________.
a. Pavlov terrarium.
b. Thorndike aquarium.
c. Watson chamber.
d. Skinner box.