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Dr John Grogan

Dr John Grogan

Dr John Grogan
BSc (Hons), PhD

Honorary Research Associate

Area of research

Dopaminergic polymorphisms in healthy memory and dementia

Office OS4
Dorothy Hodgkin Building,
Whitson Street, Bristol BS1 3NY
(See a map)

+44 (0) 117 3310097


My research looks at the role of dopamine in reinforcement learning and memory, and I test Parkinson's Disease patients, varying their medication states in order to affect the level of dopamine in their brains. I also fit computational models of reinforcement learning to the patients' data, in order to see whether dopamine medication changes parameters of the models when fit to data.



I completed my BSc. (Hons) in Psychology and the University of York, before starting my PhD in Neural Dynamics.

Activities / Findings

I completed my PhD in Neural Dynamics at the University of Bristol, and my BSc in Psychology at the University of York. My PhD work focused on the roles of dopamine in human memory, using psychological testing of human Parkinson's disease patients on several reinforcement learning and memory tests. I also used computational modelling of their behaviours on the tests to investigate the mechanisms behind dopamine's effects on memory.

My current work looks at the role of genetic polymorphisms in dopamine-related genes (e.g. receptor genes, enzyme genes) in human memory across different ages.


  • Reinforcement
  • Decision making
  • Parkinson's Disease
  • Dopamine
  • Computational Modelling


  • Parkinson's Disease

Processes and functions

  • Reinforcement Learning
  • Decision Making


  • Human testing
  • computational modelling

Selected publications

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Recent publications

View complete publications list in the University of Bristol publications system

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