Crossmodal interaction in saccadic reaction time: separating multisensory from warning effects in the time window of integration model.
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.
Diederich
Adele
A
School of Humanities and Social Sciences, Jacobs University Bremen, P.O. Box 750 561, 28725, Bremen, Germany. a.diederich@jacobs-university.de
Colonius
Hans
H
D000161:Acoustic Stimulation; D000293:Adolescent; D000328:Adult; D000344:Afferent Pathways / Q000502:physiology; D001307:Auditory Perception; D005260:Female; D005403:Fixation, Ocular; D007839:Functional Laterality; D006801:Humans; D008297:Male; D008954:Models, Biological; D010775:Photic Stimulation; D011336:Probability; D011930:Reaction Time; D012438:Saccades / Q000502:physiology*; D014732:Vibration