Charles Or

  Postdoctoral Researcher 



University of Louvain (UCL)
Institute of research in Psychology (IPSY)  
Institute of Neuroscience (IoNS)
10, Place du Cardinal Mercier
1348 Louvain-La-Neuve \ Belgium

Tel : +32 10 47 27 34
Email :



Research Interests

I am interested in studying the visual perception of faces and objects. My main focus is on how the three-dimensional shapes of faces and objects are represented and recognized despite changes (1) imposed by environmental constraints (e.g., viewing from a different angle), and (2) arising from the objects themselves (e.g., aging of faces). In addition, I am interested in how facial features are encoded, notably in unfamiliar situations such as viewing a face from another race (the other-race effect). I use a combination of tools including EEG, psychophysics, eye movement recordings and computational modelling (e.g. ideal observer models, classification image analysis).

I also take interest in studying other aspects of vision, notably the interaction of visual motion and form information. The novel periodic motion trajectories (Or et al., 2011) and moving Glass patterns (Or, Khuu, & Hayes, 2010; Glass, 1969) are among the psychophysical stimuli I developed to study the interaction.

I obtained my Ph.D. in the Department of Psychology and the Centre for Vision Research at York University, under the supervision of Prof. Hugh Wilson, after earning my master's degree (M.Phil.) with Prof. Anthony Hayes and Dr. Sieu Khuu at the University of Hong Kong.


Publications: Other

Or, C. C.-F., Peterson, M. F., & Eckstein, M. P. (submitted). Why do initial eye movements during face identification generalize across cultures?

Or, C. C.-F., & Wilson, H. R. (2013). Implicit face prototype learning from geometric information. Vision Research, 82, 1-12. j.visres.2013.02.002 

Daar, M., Or, C. C.-F., & Wilson, H. R. (2012). Increment thresholds for radial frequency trajectories produce a dipper function. Vision Research, 73, 46-52. doi:10.1016/j.visres.2012.09.010

Or, C. C.-F., & Elder, J. H. (2011). Oriented texture detection: Ideal observer modelling and classification image analysis. Journal of Vision, 11(8):16, 1–20. doi:10.1167/11.8.16

Or, C. C.-F., Thabet, M., Wilkinson, F., & Wilson, H. R. (2011). Discrimination and identification of periodic motion trajectories. Journal of Vision, 11(8):7, 1–11. doi:10.1167/11.8.7

Or, C. C.-F., & Wilson, H. R. (2010). Face recognition: Are viewpoint and identity processed after face detection? Vision Research, 50(16), 1581-1589. doi:10.1016/j.visres.2010.05.016

Or, C. C.-F., Khuu, S. K., & Hayes, A. (2010). Moving Glass patterns: Asymmetric interaction between motion and form. Perception, 39(4),
447-463. doi:10.1068/p5917

Or, C. C.-F., Khuu, S. K., & Hayes, A. (2007). The role of luminance contrast in the detection of global structure in static and dynamic, same- and opposite-polarity, Glass patterns. Vision Research, 47(2), 253-259. doi:10.1016/j.visres.2006.10.010