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RDATE:20341105T010000 TZOFFSETFROM:-0500 TZOFFSETTO:-0400 TZNAME:America/New_York EDT END:DAYLIGHT BEGIN:DAYLIGHT DTSTART:20350311T030000 RDATE:20351104T010000 TZOFFSETFROM:-0500 TZOFFSETTO:-0400 TZNAME:America/New_York EDT END:DAYLIGHT BEGIN:DAYLIGHT DTSTART:20360309T030000 RDATE:20361102T010000 TZOFFSETFROM:-0500 TZOFFSETTO:-0400 TZNAME:America/New_York EDT END:DAYLIGHT BEGIN:DAYLIGHT DTSTART:20370308T030000 RDATE:20371101T010000 TZOFFSETFROM:-0500 TZOFFSETTO:-0400 TZNAME:America/New_York EDT END:DAYLIGHT END:VTIMEZONE BEGIN:VEVENT UID:0f5539595fe3e333a7503995a1a49009 CATEGORIES:Human and computer vision series:Fall 2012 CREATED:20151203T141543 SUMMARY:Suppressive neural mechanisms: from perception to intelligence LOCATION:University of Rochester\, Department of Brain and Cognitive Sciences\, Cent er for Visual Science\, Department of Ophthalmol DESCRIPTION:Perception operates on an immense amount of incoming information that great ly exceeds its processing capacity. Because of this fundamental limitation, our perceptual efficiency is constrained by the ability to suppress irrele vant information. Here, I will present a series of studies investigating su ppressive mechanisms in visual motion processing, namely perceptual suppres sion of large, background-like motions. We find that these suppressive mech anisms are adaptive, operating only when the sensory input is sufficiently strong to guarantee visibility. Utilizing a range of methods (TMS/tDCS, ey e tracking, reaction times, neurophysiology and modeling), we link these ps ychophysical results with suppressive center-surround receptive fields, suc h as those in cortical area MT. What are functional roles of this spatial s uppression? Special population studies reveal that spatial suppression is w eaker in older adults and schizophrenic patients—a result responsible for t heir paradoxically better-than-normal performance in some conditions. Moreo ver, these subjects also exhibit deficits in figure-ground segregation, sug gesting a functional connection. In recent studies, we report direct experi mental evidence for a functional link between surround suppression and moti on segregation. Finally, I will argue that the ability to suppress informat ion is a fundamental neural process that applies not only to perception but also to cognition in general. Supporting this argument, we find that indiv idual differences in spatial suppression of motion signals strongly predict individual variations in IQ scores (r = 0.77). Readings:An easy-read summa ry of issues related to my work: http://www.bcs.rochester.edu/people/Du je/papers/05_Tadin_Nurn.pdfAn easy-read summary of a recent paper (I'll men tion this only briefly in my talk) http://www.bcs.rochest er.edu/people/Duje/papers/11_Glasser_MAE_PNAS_summary.pdfA recent short paper http://www.bcs.rochester.edu/people/Duje/papers/11_Tadin_TMS_JNsc. pdf X-ALT-DESC;FMTTYPE=text/html: