How has the median age of first marriage in the United States changed from 1970 to 2009?
a. It has dropped by about four years.
b. It has remained constant
c. It has risen by about four years.
d. It has risen by about eight years.
c
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Research has revealed that attitudes are
a. very reliable predictors of behavior. b. mediocre predictors of behavior. c. very reliable predictors of behavior in men but not women. d. very reliable predictors of behavior in women but not men.
A baby's attachment to their father
a. can be predicted by the number of diapers the father changes. b. is unrelated to infant attachment. c. is based upon the mother's pattern of attachment. d. only affects boys and not girls.
LeVine (1977, 1997) theorized that the caregiving environment in a child's development reflects a set of goals. Which of the following is the first goal in the order of importance?
a) Physical health and survival b) Promotion of behaviors c) Cultural values and morals d) Prestige and self-sufficiency
Any factor that allows for an alternative explanation for the results of a study is a threat to external validity
a. True b. False Indicate whether the statement is true or false