The principles of cross-modal integration were investigated with an auditory-tactile illusion in sighted and con-genitally blind adults. Participants had to judge the number of rapidly presented tactile stimuli, which were presented together with task-irrelevant sounds. When one tactile stimulus was accompanied by more than one tone, participants reported perceiving more than a single touch. This illusion was more pronounced in sighted than congenitally blind participants. Given that the congenitally blind were more precise in judging the number of tactile stimuli in a control condition without tones, the present data are in accordance with a modality-appropriateness account suggesting that interference by a task-irrelevant modality is reduced if processing accuracy of the task-relevant modality is high.
ErnstM.O.BanksM.S. (2002). Humans integrate visual and haptic information in a statistically optimal fashion. Nature, 415, 429–433.
4.
FlanaganJ.R.BeltznerM.A. (2000). Independence of perceptual and sensorimotor predictions in the size-weight illusion. Nature Neuroscience, 3, 737–741.
5.
GrantA.C.ThiagarajahM.C.SathianK. (2000). Tactile perception in blind Braille readers: A psychophysical study of acuity and hyperacuity using gratings and dot patterns. Perception & Psychophysics, 62, 301–312.
LedermanS.J.KlatzkyR.L.HamiltonC.MorganT. (2002). Integrating multimodal information about surface texture via a probe: Relative contributions of haptic and touch produced sound sources. In10th International Symposium on Haptic Interfaces for Virtual Environment and Teleoperator Systems (HAPTICS 2002), March, 24-25, Orlando, Florida (pp.97–104). Los Alamitos, CA: IEEE Computer Society Press.
11.
LewkowitzD.J. (2002). Heterogeneity and heterochrony in the development of intersensory perception. Cognitive Brain Research, 14, 41–63.
12.
MaurerD. (1997). Neonatal synaesthesia: Implications for the processing of speech and faces. InBaron-CohenS.HarrisonJ.E.(Eds.), Synaesthesia: Classical and contemporary readings (pp.224–242). Oxford, England: Blackwell.
13.
McGurkH.MacDonaldJ. (1976). Hearing lips and seeing voices. Nature, 264, 746–748.
14.
MuchnikC.EfratiM.NemethE.MalinM.HildesheimerM. (1991). Central auditory skills in blind and sighted subjects. Scandinavian Audiology, 29, 19–23.
15.
PiagetJ. (1952). The origins of intelligence in children. New York: International University Press.
16.
RauscheckerJ.P. (1995). Compensatory plasticity and sensory substitution in the cerebral cortex. Trends in Neurosciences, 18, 36–43.
17.
RockI.VictorJ. (1964). Vision and touch: An experimentally created conflict between the two senses. Science, 143, 594–596.
SpenceC.NichollsM.E.R.GillespieN.DriverJ. (1998). Cross-modal links in exogenous covert spatial orienting between touch, audition, and vision. Perception & Psychophysics, 60, 544–557.
24.
SteinB.E.LondonN.WilkinsonL.K.PriceD.D. (1996). Enhancement of perceived visual intensity by auditory stimuli: A psychophysical analysis. Journal of Cognitive Neuroscience, 8, 497–506.
25.
SteinB.E.MeredithM.A.(Eds.). (1993). The merging of the senses. Cambridge, MA: MIT Press.
26.
WallaceM.T.SteinB.E. (2000). Onset of cross-modal synthesis in the neonatal superior colliculus is gated by the development of cortical influences. Journal of Neurophysiology, 83, 3578–3582.
27.
WarrenD.H.PickH.L. (1970). Intermodality relations in localization in blind and sighted people. Perception & Psychophysics, 8, 430–432.
