SOLVED

167. In the United States today, about 2% of teenage girls become pregnant. 168. The majority of boys and girls in the U. S. today use contraception the first time they have sexual intercourse. 169. If teenagers become pregnant, they usually experience better long-term outcomes if they do not marry. 170. By age 6, the brain is about 80% of it adult size. 171. During adolescence, the amount of gray matter in the brain decreases and the amount of white matter increases. 173. Younger adolescents seem to rely more on the amygdala to process emotional information, whereas older adolescents rely more on the frontal regions of the brain. 175. Piaget’s view of development suggests that cognitive processes develop gradually and continuously, whereas the information-processing view suggests that thought processes change rapidly and dramatically about age 12. 176. David Elkind called adolescents’ tendency to see themselves as the center of everyone’s attention and scrutiny the “imaginary audience.” 177. Adolescents perceive themselves as much more vulnerable to injury than they actually are. 178. Adolescents are more likely to rely on “hot” decision processes than are either adults or children. 179. According to Lawrence Kohlberg’s view of moral development, most adolescents exercise conventional moral thinking most of the time.