Flash-lag effect: complicating motion extrapolation of the moving reference-stimulus paradoxically augments the effect
- 219 Downloads
One fundamental property of the perceptual and cognitive systems is their capacity for prediction in the dynamic environment; the flash-lag effect has been considered as a particularly suggestive example of this capacity (Nijhawan in Nature 370:256–257, 1994, Behav Brain Sci 31:179–239, 2008). Thus, because of involvement of the mechanisms of extrapolation and visual prediction, the moving object is perceived ahead of the simultaneously flashed static object objectively aligned with the moving one. In the present study we introduce a new method and report experimental results inconsistent with at least some versions of the prediction/extrapolation theory. We show that a stimulus moving in the opposite direction to the reference stimulus by approaching it before the flash does not diminish the flash-lag effect, but rather augments it. In addition, alternative theories (in)capable of explaining this paradoxical result are discussed.
KeywordsMotion Vector Reference Object Opposite Motion Moving Stimulus Reference Stimulus
We thank the Estonian Scientific Competency Council for their support via targeted financing research theme SF0182717s06, “Mechanisms of Visual Attention”.
- Bachmann, T. (2010). Priming and retouch in flash-lag and other phenomena of the streaming perceptual input. In R. Nijhawan & B. Khurana, B. (Eds.), Space and time in perception and action (pp. 536–557). Cambridge: Cambridge University Press.Google Scholar
- Bachmann, T., Breitmeyer, B. G., & Öğmen, H. (2007). The experimental phenomena of consciousness. A brief dictionary. New York: Oxford University Press.Google Scholar
- Enns, J.T., Lleras, A., & Moore, C.M. (2010). Object updating: a force for perceptual continuity and scene stability in human vision. In R. Nijhawan, B. Khurana, (Eds.) Space and time in perception and action (pp. 503–520). Cambridge: Cambridge University Press.Google Scholar
- Mather, G., Verstraten, F., & Anstis, S. (1998). The motion after-effect: a modern perspective. Cambridge: MIT Press.Google Scholar
- Nijhawan, R., & Khurana, B. (2000). Conscious registration of continuous and discrete visual events. In T. Metzinger (Ed.), Neural correlates of consciousness: empirical and conceptual problems (pp. 203–219). Cambridge: MIT Press.Google Scholar
- Nijhawan, R., & Khurana, B. (Eds.). (2010). Space and time in perception and action. Cambridge: Cambridge University Press.Google Scholar