In the United States and Canada as well as in northern European countries, cohabitation before marriage is now experienced by at least ____ of emerging adults
a. 1/4
b. 1/3
c. 2/3
d. 3/4
C
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In the normal pattern of development, mother-infant interactions become increasingly
a. rigid. b. disengaged. c. fussy. d. coordinated.
The inside of the cell at the disturbed area has an action potential of about __________ millivolts
a. -70 c. -40 b. +70 d. +110
Which of the following statements is true?
a. Punishment does not always work. b. The effectiveness of punishment depends solely on its force. c. Punishment should be applied intermittently. d. Punishment usually enhances the learning process.
When researcher Irving Gottesman pooled data from many studies on schizophrenia, he found that
a. genetics had very little promise as a possible causal factor in schizophrenia. b. if both parents suffered from schizophrenia, the probability that their offspring will have the illness was almost 100 percent. c. the probability that identical twins will both have schizophrenia is about three times greater than the probability for fraternal twins. d. even though there is a genetic basis to schizophrenia, the degree of genetic relatedness is not correlated with the degree of risk of suffering from the illness.