The roles of physical and physiological simultaneity in audiovisual multisensory facilitation

I-Perception
Lynnette M Leone, Mark E McCourt

Abstract

A series of experiments measured the audiovisual stimulus onset asynchrony (SOAAV), yielding facilitative multisensory integration. We evaluated (1) the range of SOAAV over which facilitation occurred when unisensory stimuli were weak; (2) whether the range of SOAAV producing facilitation supported the hypothesis that physiological simultaneity of unisensory activity governs multisensory facilitation; and (3) whether AV multisensory facilitation depended on relative stimulus intensity. We compared response-time distributions to unisensory auditory (A) and visual (V) stimuli with those to AV stimuli over a wide range (300 and 20 ms increments) of SOAAV, across four conditions of varying stimulus intensity. In condition 1, the intensity of unisensory stimuli was adjusted such that d' ≈ 2. In condition 2, V stimulus intensity was increased (d' > 4), while A stimulus intensity was as in condition 1. In condition 3, A stimulus intensity was increased (d' > 4) while V stimulus intensity was as in condition 1. In condition 4, both A and V stimulus intensities were increased to clearly suprathreshold levels (d' > 4). Across all conditions of stimulus intensity, significant multisensory facilitation occurred exclusively for simultaneous...Continue Reading

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Citations

Apr 5, 2014·Experimental Brain Research·Philip JaeklSalvador Soto-Faraco
Sep 30, 2015·The European Journal of Neuroscience·Lynnette M Leone, Mark E McCourt
Feb 28, 2016·Neuropsychologia·Juliane Krueger FisterMark T Wallace
Mar 20, 2015·Experimental Brain Research·N Van der StoepM J Van der Smagt
Oct 25, 2014·Attention, Perception & Psychophysics·N Van der StoepT C W Nijboer
May 11, 2016·Vision Research·Jessica HeemanStefan Van der Stigchel
Dec 19, 2013·I-Perception·Kenzo SakuraiYôiti Suzuki
Mar 19, 2019·Journal of Cognitive Neuroscience·Nathan Van der StoepTanja C W Nijboer
Apr 28, 2018·Experimental Brain Research·Jean-Paul NoelNathan Van der Stoep
Jul 25, 2020·Scientific Reports·Sandra MalpicaBelen Masia
Nov 23, 2016·Experimental Brain Research·Vanessa HarrarCharles Spence

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