Crossmodal interaction in saccadic reaction time: separating multisensory from warning effects in the time window of integration model
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In a focused attention task saccadic reaction time (SRT) to a visual target stimulus (LED) was measured with an auditory (white noise burst) or tactile (vibration applied to palm) non-target presented in ipsi- or contralateral position to the target. Crossmodal facilitation of SRT was observed under all configurations and stimulus onset asynchrony (SOA) values ranging from −500 (non-target prior to target) to 0 ms, but the effect was larger for ipsi- than for contralateral presentation within an SOA range from −200 ms to 0. The time-window-of-integration (TWIN) model (Colonius and Diederich in J Cogn Neurosci 16:1000, 2004) is extended here to separate the effect of a spatially unspecific warning effect of the non-target from a spatially specific and genuine multisensory integration effect.
KeywordsMultisensory integration Warning effect Time-window-of-integration Saccadic eye movement
This research was supported by grants from Deutsche Forschungsgemeinschaft Di 506/8-1 and /-3. We are grateful to Rike Steenken, and Stefan Rach for several discussions of this work and and to Dr. Annette Schomburg for her help in setting up the experiment.
- Diederich A, Colonius H (2004) Modeling the time course of multisensory interaction in manual and saccadic responses. In: Calvert G, Spence C, Stein BE (eds) Handbook of multisensory processes. MIT, CambridgeGoogle Scholar
- Diederich A, Colonius H (2007a) Why two “distractors” are better than one: modeling the effect of non-target auditory and tactile stimuli on visual saccadic reaction time. Exp Brain Res. doi: 10.1007/s00221-006-0768-0
- Meredith MA, Nemitz JW, Stein BE (1987) Determinants of multisensory integration in superior colliculus neurons. I. Temporal factors. J Neurosci 10:3215–3229Google Scholar
- Spence C, Driver J (1997) Audiovisual links in exogenous covert spatial orienting. Perc Psychophys 59(1):1–22Google Scholar
- Stein BE, Meredith MA (1993) The merging of the senses. MIT, CambridgeGoogle Scholar
- Van Atteveldt NM, Formisano E, Blomert L, Goebel R (2006) The effect of temporal asynchrony on the multisensory integration of letters and speech sounds. Cereb Cortex. doi: 10.1093/cercor/bhl007
- Van Opstal AJ, Munoz DP (2004) Auditory-visual interactions subserving primate gaze orienting. In: Calvert G, SpenceC , Stein BE (eds) Handbook of multisensory processes. MIT, Cambridge, pp 373–393Google Scholar