Dr Alasdair Clarke

Department of Psychology
Dr Alasdair Clarke



Alasdair Clarke has a background in mathematics (M.Math, University of Warwick) and a PhD in Computer Science (Heriot-Watt University). After his Phd, he worked as a post-doc at the School of Informatics, University of Edinburgh, and then at the School of Psychology, University of Aberdeen. His current research interests cover visual perception, search, and decision making.


  • PhD Heriot-Watt University,

  • M.Sc Edinburgh Napier University,

  • MMath University of Warwick,


University of Essex

  • Lecturer, Psychology, University of Essex (1/12/2016 - present)

Teaching and supervision

Current teaching responsibilities

  • The science of uncertainty (PS509)

  • Decision making science in theory and practice (PS512)

  • Research Management (PS912)

  • Special Topics in Individual Differences and Developmental Psychology (PS938)

  • Advanced Statistics for Research (PS947)


Journal articles (32)

Lonnqvist, B., Elsner, M., Hunt, AR. and Clarke, ADF., Modeling individual variation in visual search with reinforcement learning

Nowakowska, A., Clarke, ADF., Hunt, AR. and von Seth, J., Search strategies improve with practice, but not with time pressure or financial incentives

James, W., Hunt, AR. and Clarke, ADF., Six of one, half dozen of the other: Suboptimal prioritizing for equal and unequal alternatives

Nowakowska, A., Hunt, AR. and Clarke, ADF., Visual search strategies in lab and life

Nowakowska, A., Clarke, ADF., Christie, J., Reuther, J. and Hunt, AR., Less is more: Simple stimuli provoke more variable search strategies.

Lonnqvist, B., Clarke, ADF. and Chakravarthi, R., (2020). Crowding in humans is unlike that in convolutional neural networks. Neural Networks. 126, 262-274

Clarke, ADF., Irons, J., James, W., Leber, AB. and Hunt, AR., (2020). Stable individual differences in strategies within, but not between, visual search tasks. Quarterly Journal of Experimental Psychology, 174702182092919-174702182092919

Nowakowska, A., Clarke, ADF., Sahraie, A. and Hunt, AR., (2019). Practice-related changes in eye movement strategy in healthy adults with simulated hemianopia. Neuropsychologia. 128, 232-240

James, WRG., Reuther, J., Angus, E., Clarke, ADF. and Hunt, AR., (2019). Inefficient Eye Movements: Gamification Improves Task Execution, But Not Fixation Strategy. Vision. 3 (3), 48-48

Clarke, ADF., Nowakowska, A. and Hunt, AR., (2019). Seeing Beyond Salience and Guidance: The Role of Bias and Decision in Visual Search. Vision. 3 (3), 46-46

Elsner, M., Clarke, ADF. and Rohde, H., (2018). Visual Complexity and Its Effects on Referring Expression Generation. Cognitive Science. 42 (S4), 940-973

Joseph MacInnes, W., Hunt, AR., Clarke, ADF. and Dodd, MD., (2018). A Generative Model of Cognitive State from Task and Eye Movements. Cognitive Computation. 10 (5), 703-717

Mahon, A., Clarke, ADF. and Hunt, AR., (2018). The role of attention in eye-movement awareness. Attention, Perception, and Psychophysics. 80 (7), 1691-1704

Nowakowska, A., Clarke, ADF. and Hunt, AR., (2017). Human visual search behaviour is far from ideal. Proceedings of the Royal Society B: Biological Sciences. 284 (1849), 20162767-20162767

Clarke, ADF., Mahon, A., Irvine, A. and Hunt, AR., (2017). People Are Unable to Recognize or Report on Their Own Eye Movements. Quarterly Journal of Experimental Psychology. 70 (11), 2251-2270

Clarke, ADF., Stainer, MJ., Tatler, BW. and Hunt, AR., (2017). The saccadic flow baseline: Accounting for image-independent biases in fixation behaviour. Journal of Vision. 17 (11), 12-12

Nowakowska, A., Clarke, ADF., Sahraie, A. and Hunt, AR., (2016). Inefficient search strategies in simulated hemianopia.. Journal of Experimental Psychology: Human Perception and Performance. 42 (11), 1858-1872

Clarke, ADF. and Hunt, AR., (2016). Failure of Intuition When Choosing Whether to Invest in a Single Goal or Split Resources Between Two Goals. Psychological Science. 27 (1), 64-74

Clarke, ADF., Barr, C. and Hunt, AR., (2016). The effect of visualization on visual search performance. Attention, Perception, and Psychophysics. 78 (8), 2357-2362

Orquin, JL., Ashby, NJS. and Clarke, ADF., (2016). Areas of Interest as a Signal Detection Problem in Behavioral Eye-Tracking Research. Journal of Behavioral Decision Making. 29 (2-3), 103-115

Clarke, ADF., Green, P., Chantler, MJ. and Hunt, AR., (2016). Human search for a target on a textured background is consistent with a stochastic model. Journal of Vision. 16 (4), 4-4

Kohler, PJ., Clarke, ADF., Yakovleva, A., Liu, Y. and Norcia, AM., (2016). Representation of Maximally Regular Textures in Human Visual Cortex. Journal of Neuroscience. 36 (3), 714-729

O'Hare, L., Clarke, ADF. and Pollux, PMJ., (2015). VEP Responses to Op-Art Stimuli. PLoS ONE. 10 (9), e0139400-e0139400

Clarke, ADF., Elsner, M. and Rohde, H., (2015). Giving Good Directions: Order of Mention Reflects Visual Salience. Frontiers in Psychology. 6 (DEC), 1793-

Clarke, ADF. and Tatler, BW., (2014). Deriving an appropriate baseline for describing fixation behaviour. Vision Research. 102, 41-51

Clarke, ADF., Coco, MI. and Keller, F., (2013). The impact of attentional, linguistic, and visual features during object naming. Frontiers in Psychology. 4 (DEC)

O'Hare, L., Clarke, ADF. and Hibbard, PB., (2013). Visual Search and Visual Discomfort. Perception. 42 (1), 1-15

Clarke, ADF., Green, PR. and Chantler, MJ., (2012). The effects of display time and eccentricity on the detection of amplitude and phase degradations in textured stimuli. Journal of Vision. 12 (3), 7-7

Clarke, ADF., Green, PR., Halley, F. and Chantler, MJ., (2011). Similar Symmetries: The Role of Wallpaper Groups in Perceptual Texture Similarity. Symmetry. 3 (2), 246-264

Emrith, K., Chantler, MJ., Green, PR., Maloney, LT. and Clarke, ADF., (2010). Measuring perceived differences in surface texture due to changes in higher order statistics. Journal of the Optical Society of America A. 27 (5), 1232-1232

Clarke, ADF., Chantler, MJ. and Green, PR., (2009). Modeling visual search on a rough surface. Journal of Vision. 9 (4), 11-11

Clarke, ADF., Green, PR., Chantler, MJ. and Emrith, K., (2008). Visual search for a target against a 1/fβ continuous textured background. Vision Research. 48 (21), 2193-2203

Conferences (4)

Lonnqvist, B., Clarke, ADF. and Chakravarthi, R., (2019). Object recognition in deep convolutional neural networks is fundamentally different to that in humans

Papadopoulos, DP., Clarke, ADF., Keller, F. and Ferrari, V., (2014). Training Object Class Detectors from Eye Tracking Data

Elsner, M., Rohde, H. and Clarke, A., (2014). Information Structure Prediction for Visual-world Referring Expressions

Clarke, A., Halley, F., Newell, A., Griffin, L. and Chantler, M., (2011). Perceptual Similarity: A Texture Challenge

Reports and Papers (5)

Hunt, AR., James, W., Reuther, J., Spilioti, M., Mackay, E. and Clarke, ADF., Variable and sub-optimal responses to a choice problem are a persistent default mode

James, W., Reuther, J., Angus, E., Clarke, ADF. and Hunt, AR., Inefficient eye movements: Gamification improves task execution, but not fixation strategy

Clarke, ADF., Nowakowska, A. and Hunt, AR., Seeing beyond salience and guidance: the role of bias and decision in visual search

Clarke, ADF., Irons, J., James, W., Leber, AB. and Hunt, AR., Stable individual differences in strategies within, but not between, visual search tasks

Holford, DL., Juanchich, M., Foulsham, T., Sirota, M. and Clarke, ADF., Eye Tracking of Quantifier Formats

Grants and funding


Developing a collaborative framework for naturalistic visual search

British Academy



Enabling Innovation: Research to Application

+44 (0) 1206 873941


2.719, Colchester Campus