Compulsion involves recurrent, persistent, unwished-for images and thoughts designed to reduce anxiety

When formal operational thinkers are faced with a problem, such as figuring out what combination of clear liquids will produce a blue liquid, they will

a. haphazardly mix liquids to find the correct combination. b. become confused and irritated. c. systematically test hypotheses about different combinations of liquids. d. concentrate on trying to pour the liquids without spilling them.

Grief may be more intense for those who lose a loved one

a. who receives a great deal of pain medication. b. who dies a sudden death. c. who dies in a nursing home. d. who dies at a very old age.