Which of the following is NOT one of the results from Calhoun's study of rats in the overcrowded colony?
a. increased maternal protection of the young rats
b. indiscriminate aggression among the rats
c. rats experiencing stress-caused diseases
d. some rats showing sexual passivity and others displaying hypersexuality
ANSWER: a
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A. He dissected the brains of patients who had suffered strokes. B. He altered the heart rate in frogs by bathing one heart in the chemical solution he collected from another heart. C. He applied electricity to frogs' legs to animate them. D. He measured the speed at which neurons sent electrical signals and compared that to the speed of electrical current in a wire.
Christian plans to use questionnaires and interviews in his human development research project. Questionnaires and interviews are examples of ____________
procedures samples research designs research methods
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Most dementias occur in people ______
a. under age forty c. between the ages of 60 and 80 b. between the ages of 40 and 60 d. over age 80