The part of the brain that allows people to think, evaluate, and make complex judgments in a uniquely human way, and that goes through considerable development during the adolescent years, is called

Jeff has had Juan as his roommate for a semester. Jeff, who has a low opinion of his own athletic skills, has been praised by Juan on a number of occasions for his (Jeff's) play during intramural football games

To begin the spring semester, Jeff has asked for a new roommate. What's going on here? Describe the basic self-presentational underpinnings, and give a more specific theoretical explanation for Jeff's behavior.

How much language is typical for a two-year-old?

a. A vocabulary of about 50 words, but no two-word combinations b. Creative use of two- and three-word phrases c. Full sentences with still a few odd expressions d. Speech similar to that of adults, except with a more limited vocabulary