Tactile stimulation disambiguates the perception of visual motion paths
- 81 Downloads
Although visual perception traditionally has been considered to be impenetrable by non-visual information, there are a rising number of reports discussing cross-modal influences on visual perception. In two experiments, we investigated how coinciding vibrotactile stimulation affects the perception of two discs that move toward each other, superimpose in the center of the screen, and then move apart. Whereas two discs streaming past each other was the dominant impression when the visual event was presented in isolation, a brief coinciding vibrotactile stimulation at the moment of overlap biased the visual impression toward two discs bouncing off each other (Experiment 1). Further, the vibrotactile stimulation actually changed perceptual processing by reducing the amount of perceived overlap between the discs (Experiment 2), which has been demonstrated to be associated with a higher proportion of bouncing impressions. We propose that tactile-induced quantitative changes in the visual percept might alter the quality of the visual percept (from streaming to bouncing), thereby adding to the understanding of how cross-modal information interacts with early visual perception and how this interaction influences subsequent visual impressions.
KeywordsBouncing/streaming illusion Tactile transients Illusory crescent Visual-tactile interaction
The data of the reported experiments is available at https://osf.io/nz4v3/. We would like to thank Moritz Breit for his help with the collection of the data.
- Frings, C., Amendt, A., & Spence, C. (2011). When seeing doesn't matter: Assessing the after-effects of tactile distractor processing in the blind and the sighted. Journal of Experimental Psychology: Human Perception and Performance, 37, 1174–1181. https://doi.org/10.1037/a0022336 PubMedGoogle Scholar
- Grove, P.M., Ashton, J., Kawachi, Y., & Sakurai, K. (2012a). Auditory transients do not affect visual sensitivity in discriminating between objective streaming and bouncing events. Journal of Vision, 12(8):5, 1–11. https://doi.org/10.1167/12.8.5
- Michotte, A. (1963). The perception of causality. Oxford: Basic Books. [English translation by Miles T. & Miles E.; originally published as Michotte, A. (1946). La perception de la causalité. Louvain: Institut Supérior de Philosophie]Google Scholar
- Watanabe, K. (2001). Crossmodal interaction in humans. Unpublished dissertation, California Institute of Technology: Pasadena, CA.Google Scholar
- Watanabe, K., & Shimojo, S. (2005). Crossmodal attention in event perception. In: L. Itti, G. Rees, & J. Tsotsos (Eds.). Neurobiology of attention (pp. 538-543).Google Scholar