By the end of early adulthood, the most common reason for death is __________

According to the Flynn effect, IQs have __________ from one generation to the next

A) increased steadily B) decreased steadily C) fluctuated D) remained virtually the same

Drugs that alter the availability of norepinephrine and serotonin are not clinically effective in the treatment

of depression for several weeks. Which of the following does this finding suggest? A) These neurotransmitters are not involved in depression. B) That the effectiveness of antidepressants is a placebo effect, as opposed to a result of a biochemical manipulation. C) Changes in neurotransmitter function, as opposed to neurotransmitter level, cause depression. D) It is overactivity of these neurotransmitters that underlies depression, not underactivity.