Computational Neuroscience Journal Club

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• Yan Wu (University of Cambridge)
• Tuesday 12 May 2015, 16:00-17:00
• Cambridge University Engineering Department, CBL, BE-438 (http://learning.eng.cam.ac.uk/Public/Directions).

If you have a question about this talk, please contact Guillaume Hennequin.

Yan Wu will cover:

• Model-based choices involve prospective neural activity
• B B Doll, K D Duncan, D A Simon, D Shohamy and N D Daw
• Nature Neuroscience 18, 767–772 (2015)
• http://www.nature.com/neuro/journal/v18/n5/full/nn.3981.html

Decisions may arise via ‘model-free’ repetition of previously reinforced actions or by ‘model-based’ evaluation, which is widely thought to follow from prospective anticipation of action consequences using a learned map or model. While choices and neural correlates of decision variables sometimes reflect knowledge of their consequences, it remains unclear whether this actually arises from prospective evaluation. Using functional magnetic resonance imaging and a sequential reward-learning task in which paths contained decodable object categories, we found that humans’ model-based choices were associated with neural signatures of future paths observed at decision time, suggesting a prospective mechanism for choice. Prospection also covaried with the degree of model-based influences on neural correlates of decision variables and was inversely related to prediction error signals thought to underlie model-free learning. These results dissociate separate mechanisms underlying model-based and model-free evaluation and support the hypothesis that model-based influences on choices and neural decision variables result from prospection.

This talk is part of the Computational Neuroscience series.

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