{"pk":28523,"title":"Modelling Emotion Based Reward Valuation with Computational ReinforcementLearning","subtitle":null,"abstract":"We show that computational reinforcement learning can modelhuman decision making in the Iowa Gambling Task (IGT). TheIGT is a card game, which tests decision making under uncer-tainty. In our experiments, we found that modulating learningrate decay in Q-learning, enables the approximation of both thebehaviour of normal subjects and those who are emotionallyimpaired by ventromedial prefrontal lesions. Outcomes ob-served in impaired subjects are modeled by high learning ratedecay, while low learning rate decay replicates healthy sub-jects under otherwise identical conditions. The ventromedialprefrontal cortex has been associated with emotion based re-ward valuation, and, the value function in reinforcement learn-ing provides an analogous assessment mechanism. Thus rein-forcement learning can provide a good model for the role ofemotional reward as a modulator of the learning rate.","language":"eng","license":{"name":"","short_name":"","text":null,"url":""},"keywords":[{"word":"reinforcement learning; Q-learning; learning ratedecay; Iowa Gambling Task; ventromedial prefrontal impair-ment"}],"section":"Papers with Oral Presentations","is_remote":true,"remote_url":"https://escholarship.org/uc/item/2zk3x40z","frozenauthors":[{"first_name":"Can","middle_name":"","last_name":"Koluman","name_suffix":"","institution":"University of London","department":""},{"first_name":"Christopher","middle_name":"","last_name":"Child","name_suffix":"","institution":"University of London","department":""},{"first_name":"Tillmann","middle_name":"","last_name":"Weyde","name_suffix":"","institution":"University of London","department":""}],"date_submitted":null,"date_accepted":null,"date_published":"2019-01-01T18:00:00Z","render_galley":null,"galleys":[{"label":"PDF","type":"pdf","path":"https://journalpub.escholarship.org/cognitivesciencesociety/article/28523/galley/18394/download/"}]}