A new analysis of life-span age trends in visual illusion

Stanley Coren, Clare Porac

Research output: Contribution to journalArticlepeer-review

12 Scopus citations


Tested the magnitude of the over- and underestimated portions of the Ebbinghaus (Titchner circles) illusion in 688 Ss ranging in age from 5 to 70 yrs. Results indicate that the overestimated portion decreases while the underestimated portion yields increasing illusory distortion as a function of age. Both configurations produced nonlinear age trends. These results suggest that reports of inconsistent age trends in illusions may be the result of combining increasing and decreasing age functions found in some components of the same illusion configuration. (PsycINFO Database Record (c) 2006 APA, all rights reserved).

Original languageEnglish (US)
Pages (from-to)193-194
Number of pages2
JournalDevelopmental psychology
Issue number2
StatePublished - Mar 1978

All Science Journal Classification (ASJC) codes

  • Demography
  • Developmental and Educational Psychology
  • Life-span and Life-course Studies


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