Induced contrast asynchronies

Journal of Vision
Arthur ShapiroMallory Shear-Heyman

Abstract

We document a new type of perceptual effect in which asynchronous contrast signals are presented simultaneously with synchronous luminance signals. The template for the basic effect consists of two physically identical disks (.75-deg diameter, 40 cd/m2), one surrounded by a dark annulus (1.5 deg, 20 cd/m2) and the other by a light annulus (1.5 deg, 60 cd/m2). The center disks are modulated in time, with a maximum luminance of 55 cd/m2 and a minimum luminance of 25 cd/m2. With this stimulus configuration, the luminance signals of the disks modulate in phase with each other while the contrast signals relative to the surrounds modulate in anti-phase. Observers can track the contrast and luminance signals when the luminance is modulated at 1 Hz but perceive primarily the contrast signal at 2-6 Hz. We show that the asynchrony can be perceived with a thin annular surround, that the appearance of the asynchrony is dependent on the modulation amplitude, and that a decrease in the relative strength of the asynchrony at 1 Hz corresponds to the band-pass shape of the temporal contrast sensitivity function in the presence of light and dark edges. We also introduce variations of the induced contrast asynchrony principle in which a single mo...Continue Reading

Citations

Feb 2, 2008·PLoS Computational Biology·Tony VladusichFrans W Cornelissen
Dec 18, 2015·Neuron·Armin BahlAlexander Borst
Jul 31, 2008·Vision Research·Arthur Shapiro, Emily Knight
Oct 17, 2013·Vision Research·Oliver J Flynn, Arthur G Shapiro
Jun 9, 2009·Vision Research·Kai Hamburger, Arthur G Shapiro
Jan 24, 2007·Vision Research·Peter A van der Helm
Oct 5, 2010·Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists)·Arthur G Shapiro, Amber M Leaver
Nov 3, 2004·Visual Neuroscience·Arthur G ShapiroJustin P Charles
Jul 4, 2018·Scientific Reports·Isaline JacquemondDaniel Muller
Oct 4, 2019·Scientific Reports·Anika LehmannMatthias C Rillig
Apr 4, 2014·Journal of the Optical Society of America. A, Optics, Image Science, and Vision·Erica Dixon, Arthur G Shapiro
Apr 4, 2014·Journal of the Optical Society of America. A, Optics, Image Science, and Vision·Alex Rose-Henig, Arthur G Shapiro
Sep 12, 2007·Perception·Arthur G Shapiro, Kai Hamburger

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