Departmental Graduate Coordinator, Chair of the Graduate Committee, 1995-1997. Assistant Professor of Psychology, Northeastern University, 1990-1995. Research Associate in Biomedical Physics, Harvard University,1986-1990. Chromatic detection and discrimination analyzed by a Bayesian classifier. Vision Research , in press.
Rapid sensitivity changes on flickering backgrounds .
Temporal properties of the red-green chromatic mechanism. The time-course of the facilitation of chromatic detection by luminance contours. Colour is what the eye sees best. The constancy of equiluminant red-green thresholds examined in two color spaces .