Describe the "restriction of range" problem in twin studies.
What will be an ideal response?
The "restriction of range" problem in twin studies refers to the fact that the family environments for the twins being evaluated probably did not vary much. Most participants in twin studies grew up in stable, middle-class homes with married parents. Twin studies also leave out the potential influences of culture because they are usually done within one nation and are always done within one generation (because twins are born simultaneously).
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When the adrenal medulla is stimulated,
a. large amounts of catecholamines are released into the bloodstream. b. the hormone ACTH is secreted. c. corticosteroids are absorbed by the adrenal glands. d. the parasympathetic nervous system is activated.
Do you have more power with a one-tailed test or a two-tailed test?
a. We have more power with a two-tailed test. b. We have more power with a one-tailed test. c. It depends on which alternative hypothesis is true. d. Beats me!
The inability to retrieve, recall, or recognize information that was stored or is still stored in long-term memory is called:
A. interference B. forgetting C. disuse D. decoding
Despite the prevalence of psychological problems in the general population, a national survey found that only ______ of 1,600 adults diagnosed with anxiety or depression received appropriate treatment.
A. 10% B. 18% C. 30% D. 41% E. 9%