Motion Perception

Our sense of vision is fundamental to our ability to interact with the world. Additionally, a great deal of our understanding of how the brain functions is based on our knowledge of how it processes visual information. The aim of this research is to further our understanding of the workings of the human visual system, with an emphasis on how various visual pathways interact at different levels in the brain, including situations where the visual systems gets the combination of features wrong, e.g. synaesthesia. While we are interested in all aspects of visual processing, our research to date has particularly focused on motion, and how form information enhances motion processing.

Many of the objects of interest to us are in motion, so it is not surprising that the extraction of visual motion is one of the tasks that the visual system is specialised for. Indeed, a major subsystem within the brain is dedicated to motion processing. Our research has focused on a number of aspects of motion processing, including determining: how different visual pathways interact at different levels in the brain, including the interaction of motion (dorsal pathway) and form (ventral pathway) signals; the sensitivity of the visual system to optic-flow information (patterns of retinal motion produced by motion through an environment); the effect of optic-flow information on perceived stereoscopic depth; how multiple moving objects are processed, how visual search with moving objects is achieved and linking psychophysical performance to the known properties of cortical cells