Understanding visual perceptional organization remains a challenge for vision science. This manual explores ideas emanating from behavioural, developmental, neurophysiological, neuropsychological and computational approaches to the problem of visual perceptual organization. Based on papers presented at the 31st Carnegie Symposium on Cognition, held in June 2000, it addresses how the growing body of research on perceptual organization has converged on a number of critical issues including: the stimulus factors that engage the mechanisms of organization; the temporal stage of processing at...