Delayed perceptual awareness in rapid perceptual decisions.

ABSTRACT: The flourishing of studies on the neural correlates of decision-making calls for an appraisal of the relation between perceptual decisions and conscious perception. By exploiting the long integration time of noisy motion stimuli, and by forcing human observers to make difficult speeded decisions--sometimes a blind guess--about stimulus direction, we traced the temporal buildup of motion discrimination capability and perceptual awareness, as assessed trial by trial through direct rating. We found that both increased gradually with motion coherence and viewing time, but discrimination was systematically leading awareness, reaching a plateau much earlier. Sensitivity and criterion changes contributed jointly to the slow buildup of perceptual awareness. It made no difference whether motion dis

SUBMITTER: Gregori-Grgic R 

PROVIDER: S-EPMC3040746 | biostudies-literature | 2011 Feb

REPOSITORIES: biostudies-literature