Manyexperts believe that schizophrenia involves elevated levels ofthe brain chemical

Which of the following has NOT been shown to be characteristic of early maturation in girls?

a. being more popular and having a better self-image during elementary school b. having greater peer prestige and adult approval in junior high c. being more likely to get into trouble in junior high and high school d. premature identity formation and a distorted, poorly formed sense of self

In the discussions of female-male differences in math ability, researchers

a. have tended not to publish the studies showing female superiority. b. measured hormonal differences between women and men and found that the hormones played a part in the higher scores of men. c. discovered that if women are tested with men, the women use the situation competitively to raise their math performance. d. have reported that the differences between sexes is, on average, small and is getting smaller.