Author

Sam Hewitt

Wellcome Centre for Human NeuroimagingORCID 0000-0002-9219-6324Unclaimed ORCID profile · follow to get notified of new preprints

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Neuroscience· 1

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Research Focus:differential expression· 1 Organism:human· 1 Approach:machine learning (classical)· 1 Approach:statistical model· 1

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Arnaud ZaltaiD· 1 shared Charles FindlingiD· 1 shared Matthew M. NouriD· 1 shared Michael MoutoussisiD· 1 shared Raymond J. DolaniD· 1 shared Tobias U. HauseriD· 1 shared Valentin WyartiD· 1 shared Vasilisa SkvortsovaiD· 1 shared

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2025-2025 · peak 1/yr

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8 top collaborators · 28 mutual co-author links

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1 shared paperNeuroscience

Arnaud ZaltaORCID

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1 paper

Recent·Most cited

NeurosciencebioRxivPreprintDec 26, 2025

Dopamine drives a positive reward bias on human reinforcement learning

Arnaud Zalta, Vasilisa Skvortsova, Sam Hewitt…·Valentin Wyart

This study investigates how dopamine affects reinforcement learning in humans using L-DOPA and finds it reduces switching after low rewards and influences learning rate and precision.

DOI 10.64898/2025.12.24.696333

humanstatistical model

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