The most common sleep problem faced by the elderly is ______

Contrary to popular assumptions, less than ______% of dream time is devoted to sexual activity.

a) 12 b) 2 c) 23 d) 32

For several weeks, Allen had to clean the men's restroom at the restaurant where he worked

The task always made him nauseated. He has since gone on to better things, but still cannot walk by the door to a men's restroom without becoming slightly queasy. For Allen, the door to the men's room has become a(n) _____. A) unconditioned stimulus B) unconditioned response C) reflexive stimulus D) conditioned stimulus