Even though adolescents make up only 25 percent of the population of individuals who are sexually active, they account for ________ of all new cases of STDs each year

By the time children reach age 4 or 5, they combine their play schemes with those of peers by creating and coordinating roles in

A) sociodramatic play. B) adult-directed play acting. C) secondary circular reactions. D) categorization of others' intentions.

It has been suggested that the symptoms seen in autism might reflect a problem with the function of the

a. glutamate neurotransmitter system. b. hippocampus. c. hypothalamus. d. cerebellum.