What percentage of college students report having an alcoholic drink in the past 30 days?

What is the typical outcome among nonhuman primates who are raised in isolation without a parent or substitute attachment figure?

a. Their social development is normal. b. They show problems until adolescence. c. They show no problems until adolescence. d. They have dramatically troubled social relationships.

According to Dr. Lyles, PTSD symptoms only occur in a minority of patients exposed to trauma, so something must be different with those who develop PTSD.

a. true b. false