A scaling analysis of the snake lightness illusion

Alexander D. Logvinenko, Karin Petrini, Laurence T. Maloney

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)


Logvinenko and Maloney (2006) measured perceived dissimilarities between achromatic surfaces placed in two scenes illuminated by neutral lights that could differ in intensity. Using a novel scaling method, they found that dissimilarities between light surface pairs could be represented as a weighted linear combination of two dimensions, “surface lightness” (a perceptual correlate of the difference in the logarithm of surface albedo) and “surface brightness” (which corresponded to the differences of the logarithms of light intensity across the scenes). Here we attempt to measure the contributions of these dimensions to a compelling lightness illusion (the “snake illusion”).

Original languageEnglish
Pages (from-to)828-840
Number of pages13
JournalPerception and Psychophysics
Issue number5
Publication statusPublished - Jan 2008


  • visual perception
  • optics
  • vision sciences


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