Assimilation and contrast illusions: Differences in plasticity

Joan S. Girgus, Stanley Coren

Research output: Contribution to journalArticlepeer-review

61 Scopus citations


Three experiments show differences in the plasticity of the contrast and assimilation portions of the Delboeuf, Ebbinghaus, and Ponzo illusions. Contrast illusions show decrement in illusion magnitude with free inspection, whereas assimilation illusions do not. A model to explain both the original distortion and the differential susceptibility of the two classes of illusion to decrement is offered.

Original languageEnglish (US)
Pages (from-to)555-561
Number of pages7
JournalPerception & Psychophysics
Issue number6
StatePublished - Nov 1982

All Science Journal Classification (ASJC) codes

  • Experimental and Cognitive Psychology
  • Sensory Systems
  • General Psychology


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