title: Effects of fictive reward on rat's choice behavior.
abstract: Choices of humans and non-human primates are influenced by both actually experienced and fictive outcomes. To test whether this is also the case in rodents, we examined rat's choice behavior in a binary choice task in which variable magnitudes of actual and fictive rewards were delivered. We found that the animal's choice was significantly influenced by the magnitudes of both actual and fictive rewards in the previous trial. A model-based analysis revealed, however, that the effect of fictive reward was more transient and influenced mostly the choice in the next trial, whereas the effect of actual reward was more sustained, consistent with incremental learning of action values. Our results suggest that the capacity to modify future choices based on fictive outcomes might be shared by many different animal species, but fictive outcomes are less effective than actual outcomes in the incremental value learning system.
authors.affiliation: 1] Center for Synaptic Brain Dysfunctions, Institute for Basic Science, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Korea [2] Neuroscience Laboratory, Institute for Medical Sciences, Ajou University School of Medicine, Suwon 443-721, Korea [3] Neuroscience Graduate Program, Ajou University School of Medicine, Suwon 443-721, Korea.
authors.forename: Ko-Un
authors.initials: KU
authors.lastname: Kim
authors.affiliation: 1] Center for Synaptic Brain Dysfunctions, Institute for Basic Science, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Korea [2] Neuroscience Laboratory, Institute for Medical Sciences, Ajou University School of Medicine, Suwon 443-721, Korea.
authors.forename: Namjung
authors.initials: N
authors.lastname: Huh
authors.affiliation: 1] Center for Synaptic Brain Dysfunctions, Institute for Basic Science, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Korea [2] Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Korea.
authors.forename: Yunsil
authors.initials: Y
authors.lastname: Jang
authors.affiliation: Department of Neurobiology, Yale University School of Medicine, New Haven, CT 06510, USA.
authors.forename: Daeyeol
authors.initials: D
authors.lastname: Lee
authors.affiliation: 1] Center for Synaptic Brain Dysfunctions, Institute for Basic Science, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Korea [2] Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Korea [3] Neuroscience Laboratory, Institute for Medical Sciences, Ajou University School of Medicine, Suwon 443-721, Korea [4] Neuroscience Graduate Program, Ajou University School of Medicine, Suwon 443-721, Korea.
authors.forename: Min Whan
authors.initials: MW
authors.lastname: Jung
mesh_terms: D000465:Algorithms; D000818:Animals; D002755:Choice Behavior / Q000502:physiology*; D016015:Logistic Models; D008297:Male; D051381:Rats; D017207:Rats, Sprague-Dawley; D012201:Reward