The neophobia-optimality explanation of contrafreeloading rats: a reassessment.
D000818:Animals; D002755:Choice Behavior; D003216:Conditioning, Operant; D005239:Fear; D005247:Feeding Behavior; D005260:Female; D006185:Habituation, Psychophysiologic; D051381:Rats; D011919:Rats, Inbred Strains