A correlation is a numerical measure of the __________________
a) unintended changes in participants' behavior due to cues from the experimenter
b) strength of the relationship between two variables
c) behaviors of participants of different ages compared at a given time
d) behaviors of participants followed and periodically assessed over time
ANS: B
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Which of the following statements about individual differences in motor skills is true?
A) Parents tend to actively discourage girls from participating in athletic activities. B) Family income affects children's access to lessons needed to develop certain abilities. C) Boys are able to understand and process the rules of most athletic events more quickly than girls. D) Many low-SES children are less skilled in motor activities even when they are exposed to formal lessons.
Wanda drinks frequently and requires more alcohol now than she did six months ago to achieve the same effect. She reports that she can out-drink most people. Wanda is probably
a) genetically predisposed to alcoholism. b) developing a physiological dependence on alcohol. c) acquiring behavioral skills in modulating her drinking. d) deluding herself. This is not physically possible.