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

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

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.

Not available

Back to Abstract