The encoding of perceived speed
The project investigates the perception and dynamics of speed in human vision. We are using a range of techniques in order to delvelop a physiologically plausible model of speed perception. At the heart of the project is the aim to reconcile motion energy and ratio models of perceived speed.


Champion, R.A.,  & Hammett, S.T. & Thompson, P. G. (2006) Perceived direction of plaid motion is not predicted by component speeds, Vision Research, in press.

Thompson P.G,  Brooks K. & Hammett S.T. (2006) Reducing stimulus contrast: speed can go up as well as down. Vision Research,  46, 782-786.

Hammett, S.T., Champion, R.A., Morland, A.B. & Thompson, P.G. (2006) Perceptual distortions of speed at low luminance:  Evidence inconsistent with a Bayesian account of speed encoding, Vision Research, in press.

Hammett, S.T, Champion,  R.A.C., Morland, A.B. & Thompson, P.G. (2005) A ratio model of perceived speed in human vision. Proceedings of the Royal Society B,  272, 2351-2356.

Hammett, S.T., Thompson, P.G. & Bedingham, S.(2000). The dynamics of velocity adaptation in human vision, Current Biology, 10, 1123-1126.