Detection facilitation by collinear stimuli in humans: dependence on strength and sign of contrast

Vision Research
C Wehrhahn, B Dresp

Abstract

We measured detection of a thin vertical line (target) in the presence of a slightly thicker collinear, adjacent line (inducer). Sign and strength of contrast of the inducer were varied. Test lines could be either bright or dark. Detection thresholds were obtained through a temporal two-alternative forced-choice (2AFC) procedure with the method of constant stimuli. When target and inducer had equal contrast polarity, low thresholds of target lines were observed for low inducer contrasts and increased with increasing inducer contrast. With opposite contrast polarity of target and inducer, thresholds were high for low inducer contrasts and decreased for increasing contrast thereof. Our results support the hypothesis that cortical mechanisms with different sensitivity to the sign and strength of contrast participate in the detection facilitation of line contours.

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Citations

Oct 30, 2009·Journal of Neurophysiology·Barbara Dillenburger, Anna W Roe
Sep 24, 2010·The Journal of Neuroscience : the Official Journal of the Society for Neuroscience·Arezoo PooresmaeiliAlexander Thiele
Jan 5, 2007·Psychonomic Bulletin & Review·Michael J Wenger, Christoph Rasche
Jan 9, 2004·Perception & Psychophysics·Sergio Roncato, Clara Casco
Jan 19, 2012·Developmental Science·Marcin SzwedStanislas Dehaene
May 18, 1999·Vision Research·Y Bonneh, D Sagi
Dec 21, 2004·Vision Research·Birgitta Dresp, Osmund Keith Langley
Jan 20, 1999·Vision Research·Y Bonneh, D Sagi
Oct 22, 2003·Vision Research·Michael H HerzogManfred Fahle
Dec 27, 2005·Vision Research·Tzvetomir Tzvetanov, Lidwine Simon
Mar 13, 2002·Vision Research·Russell L WoodsEli Peli
Nov 26, 2002·Vision Research·Tzvetomir Tzvetanov, Birgitta Dresp
Nov 26, 2002·Vision Research·Leo Poom
Jul 10, 2008·Vision Research·S J Harrison, D R T Keeble
Jul 26, 2016·Frontiers in Psychology·Sergio RoncatoLuca Battaglini
Jun 17, 2014·PloS One·Sophie HallKun Guo
Aug 16, 2016·Frontiers in Psychology·Birgitta Dresp-Langley, Stephen Grossberg
Jun 13, 2008·Perception·Oronzo Parlangeli, Sergio Roncato
Jun 23, 2007·Nature Reviews. Neuroscience·Odelia SchwartzPeter Dayan
Mar 4, 2005·Journal of Neurophysiology·Maarten J van der SmagtThomas D Albright
Nov 6, 2015·Frontiers in Psychology·Birgitta Dresp-Langley
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Apr 12, 2000·Journal of Neurophysiology·S L Brincat, G Westheimer
Jun 3, 2021·Scientific Reports·Chia-Huei TsengChien-Chung Chen

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