Perceptual grouping in the Ternus display: evidence for an 'association field' in apparent motion

Vision Research
David Alais, J Lorenceau

Abstract

We present psychophysical experiments designed to reveal the role of facilitative contour interactions (the so-called 'association field') in apparent motion. We use the Ternus display (a trio of horizontally aligned elements oscillating in apparent motion). This display is perceived in 'element' motion when interframe intervals (IFIs) are short, and in 'group' motion when IFIs are long. Using Gabor elements arranged collinearly or in parallel, IFI is varied to find group motion thresholds. Consistent with a role for collinearity in perceptual grouping, thresholds are lower for collinear displays. The collinear vs. parallel comparison is made while manipulating contrast, spatial frequency, eccentricity, phase, orientation jitter and element separation. Results show a clear effect of contrast not observed in lateral masking paradigms or in 'pathfinder' stimuli, with higher contrast promoting within-frame grouping, and evidence of facilitatory interactions among parallel elements (although over a smaller scale). The tendency for collinear displays to group more than parallel displays declined with eccentricity with no clear difference evident at 12 deg. These changes in group motion thresholds indicate changing association streng...Continue Reading

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Citations

Nov 2, 2006·Perception & Psychophysics·Takahiro Kawabe, Kayo Miura
Jan 26, 2011·Attention, Perception & Psychophysics·Lihan Chen, Xiaolin Zhou
Jan 24, 2014·Attention, Perception & Psychophysics·Elisabeth Hein, Cathleen M Moore
Jun 6, 2006·Vision Research·Haluk OğmenMichael H Herzog
Feb 8, 2005·Vision Research·Michael D DoddJay Pratt
Sep 2, 2014·Vision Research·Teresa TannazzoFarhan Bukhari
Jul 17, 2007·Vision Research·Julian M Wallace, Nicholas E Scott-Samuel
Jan 27, 2011·Vision Research·Murat AydınHaluk Oğmen
Nov 27, 2002·Vision Research·Sébastien GeorgesJean Lorenceau
May 21, 2016·Frontiers in Human Neuroscience·Simone GoriAndrea Facoetti
Nov 13, 2015·Perception·Molly R Silva, J Timothy Petersik
Jul 27, 2005·Perception·Anna Ma-WyattPeter Wenderoth
Dec 16, 2005·Journal of Neurophysiology·Jason M SamondsA B Bonds
Sep 8, 2018·Attention, Perception & Psychophysics·Elisabeth Hein, Alexander C Schütz
Jun 30, 2019·Attention, Perception & Psychophysics·Madeleine Y StepperElisabeth Hein

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