In all cultures, masturbation in children is observed as early as
a. infancy
b. early childhood
c. middle childhood
d. pre-adolescence
A
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Hearing problems in children are __________ vision problems.
A. less common than B. about as common as C. more common than D. generally tied to
If a researcher conducts an experiment in which the independent variable is poorly defined (i.e., has a poor operational definition), then the experiment can be said to have ____
a. low internal validity b. low external validity c. low construct validity of the cause d. low construct validity of the effect
Cases of intellectual disabilities in which no known biological problems can be identified and with close relatives also being mildly disabled are called __________ intellectual disabilities
a. inorganic b. metabolic c. familial d. functional
Kendler et al. found that the same genetic factors contribute to both
A. anxiety and dementia. B. dementia, and depression. C. anxiety and depression. D. Alzheimer's and anxiety.