Ellen's 8-year-old son Lee has been experiencing increased thirst and urination, hunger, weight loss, and blurred vision for 2 months. A doctor examines him and undertakes a few tests. The test reports suggest that his condition is caused by insulin deficiency. Lee is most likely to be diagnosed with:

With regard to attention-deficit/hyperactivity disorder (ADHD),

a. ADHD is associated with high self-esteem. b. boys are ten times less likely to be classified as ADHD than are girls. c. the disorder interferes with learning. d. ADHD usually wanes in adulthood. e. ADHD is the least common childhood behavior disorder.

All of the following are approaches to the study of adolescents EXCEPT:

A) biological. B) cognitive. C) psychiatric. D) social.