Oscar is thirteen and frequently twists his head uncontrollably, and yelps or grunts. If he has not done this for several hours, he has a sensation that can only be relieved by engaging in these movements and sounds. Oscar has had this problem since he was nine. The most likely diagnosis is __________.

A baby is considered small for gestational age if

a) the baby was born 38 weeks after conception. b) the baby weighs less than 2,500 grams. c) because of fetal growth the baby weights 90% (or less) of the average weight of other infants the same gestational age. d) the baby weighs less than 1,250 grams.

From the twenties to the sixties,

A) spatial memory suffers much less than verbal memory. B) the amount of information people can retain in working memory diminishes. C) adults rehearse more than they did in early adulthood. D) the speed at which adults can repeat information to themselves increases.