By far, the most common chronic disease or condition of children in the United States is

Children begin to think symbolically by the end of which stage of cognitive development?

a. Sensorimotor b. Preoperational c. Concrete operational d. Formal operational e. Cognitive

A sophisticated prospective study of the role of stressful life events in bipolar disorder found that

A) low levels of stress protected an individual against manic episodes. B) high levels of stress were associated with the occurrence of manic, hypomanic, and depressive episodes. C) low levels of stress protected an individual against depressive episodes. D) high levels of stress were not associated with the occurrence of manic or depressive episodes.