image1Biographical Info:

John received a BSc in Psychology from the University of York in 2011, and a PhD in Neural Dynamics from the University of Bristol in 2015. He was a postdoc at the University of Bristol, and the University of Oxford before joining the lab.

His past work has looked at how dopamine and Parkinson’s disease affect cognitive functions like reinforcement learning, short-term memory, motivation, and decision-making. His current work uses electroencephalography and computational modelling to investigate how internal noise can be measured in decision-making, and how ageing affects decision-making processes.


Grogan, J. P., Fallon, S. J., Zokaei, N., Husain, M., Coulthard, E. J., & Manohar, S. G. (2020). A new toolbox to distinguish the sources of spatial memory error. Journal of Vision, 20(13), 6-6. 

Zokaei, N., Grogan, J., Fallon, S.J., Slavkova, E., Hadida, J., Manohar, S., Nobre, A.C., Husain, M. (2020). Short-term memory advantage for bried durations in human APOEε4 carriers. Scientific Reports, 10 (9503). 

Grogan, J.P., Sandhu, T.R., Hu, M.T., & Manohar, S.G. (2020). Dopamine promotes instrumental motivation, but reduces reward-related vigour. eLife, 9:e58321 

Wilkinson, M.P., Grogan, J.P., Mellor, J.R., & Robinson, E.S.J. (2020). Comparison of conventional and rapid-acting antidepressants in a rodent probabilistic reversal learning task. Brain and Neuroscience Advances, 4, 2398212820907177. 

Grogan, J.P., Isotalus, H.K., Howat, A., Irigoras Izagirre, N., Knight, L.E. & Coulthard, E.J. (2019). Levodopa does not affect expression of reinforcement learning in older adults. Scientific Reports, 9:6349. 

Grogan, J.P., Knight, L.E., Smith, L., Irigoras Izagirre, N., Howat, A., Knight, B.E., Bickerton, A., Isotalus, H.K., & Coulthard, E.J. (2018). Effects of Parkinson’s disease and dopamine on digit span measures of working memory. Psychopharmacology, 235 (12), 3443-3450. 

Grogan, J.P., Tsivos, D., Smith, L., Knight, B.E., Bogacz, R., Whone, A., Coulthard, E.J. (2017). Effects of dopamine on reinforcement learning and consolidation in Parkinson’s disease. eLife, 6, e26801.

Grogan, J., Bogacz, R., Tsivos, D., Whone, A., & Coulthard, E. (2015). Dopamine and Consolidation of Episodic Memory: Timing is Everything. Journal of Cognitive Neuroscience, 27 (10), 2035–2050. 

Jefferies, E., Grogan, J., Mapelli, C., & Isella, V. (2012). Paced reading in semantic dementia: word knowledge contributes to phoneme binding in rapid speech production. Neuropsychologia, 50(5), 723–32.