Seventeen-year-old Diwali and his parents don't get along well. Their relationship is characterized by fighting, when they even bother to speak to each other. This may constitute what type of risk factor for Diwali, with regard to substance abuse?

Which of the following would not be present during a major depressive episode?

a. Changes in appetite and sleeping habits b. Anxiety c. Anhedonia d. Grandiosity

Within the context of reinforcement and punishment, positive refers to the ______ of something ______, and negative refers to the ______ of something.

Fill in the blank(s) with the appropriate word(s).