Remembering words like book, tree, and butterfly better than words like justice, meaning, and life illustrates the ______________ effect.

That there is a need for REM sleep is suggested by

a. REM rebound. b. REM tolerance. c. eye movements accompanying REM sleep. d. emotional catharsis during REM sleep.

According to this theory, sleep is a product of adaptation

a. restorative theory b. evolutionary theory c. psychoanalytic theory d. dream theory e. activation-synthesis theory