Shannon, a junior in high school, was recently suspended from school for extorting money from ninth-graders and beating up another student. Shannon's teacher reports that she has very few friends. The most likely diagnosis for Shannon would be:

Compared to anxiety, a panic attack tends to be

a. sudden. b. longer in duration. c. less intense. d. less like a normal fear response.

Ekman conducted a number of studies of facial expressions and found that

A) expression varies from culture to culture. B) there are too many emotions to classify. C) seven primary emotions are almost universal. D) common expressions exist only for happiness.