Experimental, placebo-controlled studies have demonstrated that using subliminal messages to control appetite or smoking have _____ effect on behavior

A __________ is a very frightening dream that occurs during REM sleep

a) nightmare b) sleep terror c) night terror d) narcoleptic fit

Pavlov placed food in the mouths of dogs, and they began to salivate. The food acted as a (an)

a. unconditioned response. b. unconditioned stimulus. c. conditioned response. d. conditioned stimulus. e. neutral stimulus.