Is there a general trait of susceptibility to simultaneous contrast?

  • Bosten J
  • Mollon J
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Individuals differ in their susceptibility to simultaneous contrast. Are the underlying differences in neural machinery conserved across different stimulus dimensions? We measured the extent to which 101 subjects perceived simultaneous contrast on the dimensions of luminance, colour, luminance contrast, colour contrast, orientation, spatial frequency, motion and numerosity. Individual differences showed re-test reliability for each dimension (0.32.≤ ICC(c,1) ≤0.78, p≤0.05), but susceptibility to simultaneous contrast, with a few exceptions, was not correlated across dimensions. Either susceptibility to contrast arises empirically from an individual's interactions with the environment, or it is genetically determined but independently for different dimensions. © 2010 Elsevier Ltd.

Author-supplied keywords

  • Colour
  • Constancy
  • Individual differences
  • Lateral interactions
  • Simultaneous contrast

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  • J. M. Bosten

  • J. D. Mollon

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