September 2015
Volume 15, Issue 12
Free
Vision Sciences Society Annual Meeting Abstract  |   September 2015
No correlations between the magnitude of visual illusions
Author Affiliations
  • Lukasz Grzeczkowski
    Laboratory of Psychophysics, Brain Mind Institute, École Polytechnique Fédérale de Lausanne (EPFL), Switzerland
  • Aaron Clarke
    Laboratory of Psychophysics, Brain Mind Institute, École Polytechnique Fédérale de Lausanne (EPFL), Switzerland
  • Fred Mast
    Department of Psychology, University of Bern, Switzerland
  • Michael Herzog
    Laboratory of Psychophysics, Brain Mind Institute, École Polytechnique Fédérale de Lausanne (EPFL), Switzerland
Journal of Vision September 2015, Vol.15, 1132. doi:10.1167/15.12.1132
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    • Get Citation

      Lukasz Grzeczkowski, Aaron Clarke, Fred Mast, Michael Herzog; No correlations between the magnitude of visual illusions. Journal of Vision 2015;15(12):1132. doi: 10.1167/15.12.1132.

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      © ARVO (1962-2015); The Authors (2016-present)

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Abstract

In cognition, audition and somatosensation, performance correlates strongly between different tasks suggesting the existence of common factors. Surprisingly, this does not hold true for vision. For example, Vernier acuity and Gabor detection correlate very weakly (r2 = 0.003). Here, we show similar results for visual illusions. 143 participants, aged from 8 to 81 were tested for illusion magnitude using the method of adjustment in six visual illusions. Correlations of illusion strength were very low and mostly non-significant. For example, the correlation between the Ebbinghaus and the Ponzo illusion was r2 = 0.07, i.e., the two illusions have only 7% of variance in common. Results for males and females were similar. Our null results are supported by good test-retest reliability and a Bayesian analysis. Our results suggest that, contrary to cognition, audition and somatosensation, there is no general factor for vision.

Meeting abstract presented at VSS 2015

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