Often, psychologists are interested in the degree to which genetic and environmental factors play a role in determining intelligence, so they study twins raised in different homes and compare them with twins reared together. A potential problem with the interpretation of such results is that
a. all pairs of children in the same household will not necessarily have equally similar experiences.
b. for the twins reared apart, there is a delay between birth and placement in foster homes which may span a critical learning period.
c. prenatal experiences are more similar for twins than for other children.
d. all of these
D
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Hohmann's research showed that the higher the damage on the spinal cord, the
a. more intense his or her feelings are. b. less able he or she is to express emotion. c. greater his or her sense of regret in not being able to express emotion. d. less intense his or her feelings are. e. more capable he or she is at expressing emotion.
Attitudes are __________
a) innate. b) generally positive. c) learned. d) unchangeable.
What percentage of adolescents who use illegal drugs have used marijuana in the past?
A) 10% B) 25% C) 70% D) 90%
Which of the following is a type of learning in which we learn to cease paying attention to familiar stimuli?
a. habituation. b. dishabituation. c. perseveration. d. a perceptual set.