In speed skating, behavior is reinforced on a _____ schedule

Which of the following is one of the characteristics that distinguish between the adolescent's and the child's self-concept?

A. Adolescents tend to view the self as involving more dimensions than do children. B. Adolescents distinguish among actual, ideal, and feared selves. C. The adolescent's self varies over time and across situations. D. All of the above.

Chris is just starting to experience an eightfold increase in the amount of estrogen. Chris is most likely a

very feminine boy. normal 10-year-old boy. normal 9-year-old girl. typical 12-year-old girl