Alex Holcombe's home pageAlex HolcombeAlex O. Holcombe, PhD       Contact Info and Bio
Associate Professor
School of Psychology, University of Sydney, Australia.
Class material

Perception and attention research

Moving objects present a problem for the human visual system because as they move, they stimulate disparate neurons across cortex. In my lab we investigate how signals from different neurons' glimpses of a moving object areas are combined, as well as how temporal limits constrain our tracking of important objects in a dynamic scene.

We study temporal aspects of the processing of stationary objects, too. Behavioral experiments illustrated by the animations below compare speed limits for different features and the dynamics of how these features are bound into a coherent percept.

Ongoing applications include assessing whether brain-damaged patients' temporal deficits are improved by magnetic brain stimulation, and testing the effect of naps on temporal processing. Here is a gentle introduction.


Published research


Animations of perceptual phenomena

  1. Failure to bind color with motion
  2. Temporal limits on position tracking
  3. Breaking crowding
  4. Color-motion asynchrony eliminated
  5. Binding at a global stage
  6. Global form binding
  7. Two speeds for binding color&shape
  8. Binding words
  9. Temporal transparency
  10. Twinkle aftereffect
  11. Wakes&spokes brightness illusions
  12. Midstream order deficit


Lab wiki


An earlier version of this summary of temporal limits on vision appears in Trends in Cognitive Science, 13(5):216-21.

Improving scientific practice

Holcombe, A.O. (2015) Going beyond the published article: how Open Access is just a start

Simons, D.J., Spellman, B., & Holcombe, A.O. (2014). An introduction to the first Registered Replication Report. Perspectives on Psychological Science, 9(5), 552-555.

Simons, D.J. & Holcombe, A.O. (2014). Registered Replication Reports. The Observer, 27(3).

Registered Replication Reports are open for replication study proposals! I'm an editor for this initiative we developed at the journal Perspectives on Psychological Science

Holcombe, A.O. (2013). Riled up by Elsevier’s take-downs? Time to embrace open access.


Protect yourself from the replicability crisis of science

Todd, M. & Holcombe, A.O. (2012). Scientific data should be shared: An open letter to the ARC

Holcombe, A.O. (2012). Scientists are tearing down publishers' walls

Holcombe, A.O. & Pashler, H. (2012). Making it quick and easy to report replications. (via PsychFileDrawer) The Psychologist

Todd, M. & Holcombe, A.O. (2013). Open publishing is happening - the only question is how.