Shortly after Louisa learned that her mother had been killed in an automobile accident, she walked around her hometown for hours not knowing where she was. She was probably exhibiting
a. anticipatory coping.
b. burnout.
c. chronic stress.
d. psychic numbness.
e. disinhibition.
d. psychic numbness.
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Six-week-old Beck is lying in his crib and making a melodic sound that might be described as an "ooooh.". Beck is best thought of as currently
a. babbling. b. using pragmatics. c. cooing. d. holophrasing.
If the results of a study are due to factors other than those included in the research investigation, the study is said to have ____
a. poor reliability b. low statistical significance c. a low base rate d. poor internal validity
If the concordance rate for alcoholism were 50 percent among identical twins, which of the following would be true?
A. If you inherit the gene that encodes alcoholism, you will develop alcoholism. B. If there is no alcoholism in your family, you will never develop a problem with alcoholism. C. If your father suffers from alcoholism, you will not develop the problem as long as he is not involved in raising you. D. If your twin struggles with alcoholism, you have an increased chance of having the same problem, but ultimately whether you do is also influenced by environmental factors.
A researcher believes that women today weigh less than in previous years. To investigate this belief, she randomly samples 41 adult women and records their weights. The scores have a mean of 111 lbs. and a standard deviation of 12.4 . A local census taken several years ago shows the mean weight of adult women was 115 lbs. The df for determining tcrit = _________
a. 41 c. 39 b. 40 d. need more information