Twelve-year-old Heather has a smaller head circumference and less gray matter thickness than typical children of her same age, sex, and size. It is most likely that

A. Heather's mother used alcohol or other drugs during her pregnancy.
B. Heather's mother has PKU.
C. Heather has PKU.
D. Heather has fragile-X syndrome.

Answer: A

Psychology

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In a normal distribution, what proportion of scores fall within the interval between the

mean to one standard deviation above the mean? a. .1359 b. .3413 c. .6826 d. .8413

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The probable reason that Ebbinghaus's forgetting curves were so steep was that Ebbinghaus a. had a poor memory. b. learned too many lists. c. used meaningless materials

d. used autobiographical materials.

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