Centrifugal bias for second-order but not first-order motion.
Limited-lifetime Gabor stimuli were used to assess both first- and second-order motion in peripheral vision. Both first- and second-order motion mechanisms were present at a 20-deg eccentricity. Second-order motion, unlike first-order, exhibits a bias for centrifugal motion, suggesting a role for the second-order mechanism in optic flow processing.
Dumoulin
S O
SO
Department of Ophthalmology, McGill University, Montréal, Québec, Canada. serge@bic.mni.mcgill.ca
Baker
C L
CL
Hess
R F
RF
D016880:Anisotropy; D015350:Contrast Sensitivity / Q000502:physiology*; D006801:Humans; D008027:Light; D016014:Linear Models; D009039:Motion Perception / Q000502:physiology*; D017711:Nonlinear Dynamics; D010775:Photic Stimulation / Q000379:methods; D011594:Psychometrics / Q000379:methods; D013269:Stochastic Processes; D014794:Visual Fields