Colloquium Event - Friday 24th September

Dr Tom Freeman
School of psychology, Cardiff University

Title: "Motion illusions, eye movements and Bayes"
When: Friday September 24th at 4pm
Where: Education Building Room 424

Abstract:

Most of the work on motion perception ignores the fact that the eyes move to track targets of interest. Movement in the image therefore combines object motion and self-motion. To disentangle the various sources of movement, the visual system uses ‘extra-retinal’ information from the motor system to compensate for the effects of self-motion. Evidently the compensation is not always complete: I shall show examples of some well-documented motion illusions that occur when we make pursuit eye movements. Vision science typically places the blame for these motion illusions on inaccurate sensory processes. Here I present an alternative view, based on the idea that sensory processes are not inaccurate but imprecise. In the course of doing so, I reveal some important limitations of current Bayesian models of motion perception.

Tom's home page: http://www.cardiff.ac.uk/psych/contactsandpeople/lecturing/freeman-tom-overview_new.html

The Colloquium programme is available here