Research whose main purpose is to generate self-reports of attitudes from a large number of participants is likely to involve

Which neurotransmitter has NOT been linked to depression?

a. serotonin b. dopamine c. norepinephrine d. acetylcholine

Which drug tends to lead to a relaxed euphoria, sedation, and reduced apprehension?

a) heroin b) cocaine c) LSD d) amphetamine