First-order structure induces the 3-D curvature contrast effect

Susan F. Te Pas*, Astrid M L Kappers

*Corresponding author for this work

Research output: Contribution to JournalArticleAcademicpeer-review


A 3-D curvature contrast effect has been reported in shading-and-texture-defined (Curran & Johnson (1996). Vision Research 36, 3641-3653) and in stereoscopically defined (te Pas, Rogers, & Ledgeway (2000). Current Psychology Letters: Brain, Behaviour and Cognition 1, 117-126) stimuli. Our experiments show that a clear 3-D curvature contrast effect also occurs in motion-defined stimuli. The magnitude of the effect is similar in motion-, stereo- and shading-and-texture defined stimuli, suggesting that the 3-D curvature contrast effect is shape-based. We find a distinct contrast effect that is similar in the case of inducers that contain second-order (curvature) information and in the case of inducers that contain only first-order (slant and tilt) information. The effect with inducers that contain only zeroth-order (depth) information is very small. We conclude that the first-order structure is sufficient to induce a 3-D contrast effect.

Original languageEnglish
Pages (from-to)3829-3835
Number of pages7
JournalVision Research
Issue number28
Publication statusPublished - 2001


  • Curvature contrast
  • Curvature discrimination
  • Structure-from-motion
  • Vision


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