Two-year-old Jake's vocabulary has suddenly increased quite rapidly. He is exhibiting the ______

Schizotypal personality disorders differ from other "odd" personality disorders in that they are related to schizophrenia and:

A) stress disorders. B) mood disorders. C) anxiety disorders. D) mental retardation.

As overweight children approach adolescence, they become less popular because they

a. have fewer social skills. b. do less well academically. c. are less likely to be found sexually attractive. d. become more aggressive with peers.