title: Learning to become an expert: reinforcement learning and the acquisition of perceptual expertise.
abstract: To elucidate the neural mechanisms underlying the development of perceptual expertise, we recorded ERPs while participants performed a categorization task. We found that as participants learned to discriminate computer generated "blob" stimuli, feedback modulated the amplitude of the error-related negativity (ERN)-an ERP component thought to reflect error evaluation within medial-frontal cortex. As participants improved at the categorization task, we also observed an increase in amplitude of an ERP component associated with object recognition (the N250). The increase in N250 amplitude preceded an increase in amplitude of an ERN component associated with internal error evaluation (the response ERN). Importantly, these electroencephalographic changes were not observed for participants who failed to improve on the categorization task. Our results suggest that the acquisition of perceptual expertise relies on interactions between the posterior perceptual system and the reinforcement learning system involving medial-frontal cortex.
authors.affiliation: University of Victoria, Canada. krigolson@psych.ubc.ca
authors.forename: Olav E
authors.initials: OE
authors.lastname: Krigolson
authors.forename: Lara J
authors.initials: LJ
authors.lastname: Pierce
authors.forename: Clay B
authors.initials: CB
authors.lastname: Holroyd
authors.forename: James W
authors.initials: JW
authors.lastname: Tanaka
mesh_terms: D000293:Adolescent; D000704:Analysis of Variance; D001931:Brain Mapping; D004192:Discrimination, Psychological / Q000502:physiology*; D004569:Electroencephalography / Q000379:methods; D005071:Evoked Potentials / Q000502:physiology; D030141:Feedback, Psychological / Q000502:physiology; D005260:Female; D006801:Humans; D007858:Learning / Q000502:physiology*; D008297:Male; D010364:Pattern Recognition, Visual / Q000502:physiology; D010775:Photic Stimulation / Q000379:methods; D017397:Prefrontal Cortex / Q000502:physiology; D011930:Reaction Time / Q000502:physiology; D012054:Reinforcement, Psychology; D014796:Visual Perception / Q000502:physiology*; D055815:Young Adult