title: The magnitude and dynamics of interocular suppression affected by monocular boundary contour and conflicting local features.
abstract: A monocular boundary contour (MBC) rivalry stimulus has two half-images, a homogeneous grating and the same homogeneous grating with an additional disc region. The outline/frame of the MBC disc is created by relative phase-shift, or orientation-difference. We found the increment contrast threshold and reaction time to detect a monocular Gabor probe elevated on the homogeneous half-image pedestal. The interocular suppression begins as early as 80ms upon stimulus onset. Moreover, the suppression magnitude is larger when the MBC disc is defined by orientation-difference rather than phase-shift, revealing the suppression caused by competing local features in addition to MBC.
authors.affiliation: Department of Basic Sciences, Pennsylvania College of Optometry at Salus University, Elkins Park, PA 19027, USA.
authors.forename: Yong R
authors.initials: YR
authors.lastname: Su
authors.forename: Zijiang J
authors.initials: ZJ
authors.lastname: He
authors.forename: Teng Leng
authors.initials: TL
authors.lastname: Ooi
mesh_terms: D015350:Contrast Sensitivity / Q000502:physiology; D023882:Dominance, Ocular / Q000502:physiology; D006801:Humans; D010775:Photic Stimulation; D011930:Reaction Time; D012684:Sensory Thresholds; D015348:Vision, Binocular / Q000502:physiology*; D015349:Vision, Monocular / Q000502:physiology*; D014796:Visual Perception / Q000502:physiology