Interstimulus interaction in an audiovisual temporal order judgment task: The role of offset of the preceding stimulus and stimulus length on temporal perception.
Poster Presentation

Lars T. Boenke
Leibniz Institute for Neurobiology, Magdeburg, Germany

Matthias Deliano
Leibniz Institute for Neurobiology, Magdeburg, Germany

Frank W. Ohl
Leibniz Institute for Neurobiology, Magdeburg, Germany

     Abstract ID Number: 102
     Full text: Not available
     Last modified: May 30, 2007
     Presentation date: 07/06/2007 10:00 AM in Quad Maclauren Hall
     (View Schedule)

Abstract
Various studies have suggested a fixed temporal order threshold in temporal order judgment (TOJ) tasks irrespective of the modality or modality-combination of the utilized stimuli (e.g. Hirsh & Sherrick, 1961; Pöppel, 1997). However, recent work demonstrated several confounding factors overlooked by these classical studies, such as stimulus-related (eccentricity, spatial position) or response-related cues (Keetels & Vroomen, 2005; Zampini et al., 2003). Significant interaction between auditory and visual stimuli has been described especially in the range of 50-100ms (Morein-Zamir et al., 2003; Shimojo & Shams, 2001; Vroomen & Keetels, 2006). Since stimulus lengths <100ms have been employed in these studies, a potential confounding effect of stimulus onset asynchrony (SOA) is the interaction between offset of the first stimulus and onset of the second stimulus (offset-onset interaction). Preliminary results indicate that by systematic variation of SOAs and stimulus lengths the effects of SOA and offset-onset interaction on the TOJ can be dissociated.