Research indicates that many stereotyped gender roles (such as boys being more achievement-oriented, or girls being more social) do exist

Contrary to adult fears, many teenage romances do not include sexual intercourse

Indicate whether this statement is true or false.

In people with normal circadian clocks, what effect does melatonin taken in pill form have on jet lag?

A. It helps people to adjust to jet lag. B. It helps people to adjust to jet lag, but only if traveling east to west. C. It helps people to adjust to jet lag, but only if traveling west to east. D. It was no more effective than a placebo in reducing jet lag.