title: Associative and nonassociative theories of the UCS preexposure phenomenon: implications for Pavlovian conditioning.
mesh_terms: D000818:Animals; D001244:Association; D001362:Avoidance Learning; D003214:Conditioning, Classical; D003213:Conditioning, Psychological; D004644:Emotions; D005143:Eyelids; D006185:Habituation, Psychophysiologic; D006801:Humans; D011582:Psychological Theory; D011817:Rabbits; D051381:Rats; D013649:Taste