Techniques for the measurement of the Poggendorff and Zoellner illusions in large-group situations

Stanley Coren, Clare Porac

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


Although validated procedures exist for group measurement of illusions of extent and area, few exist for the measurement of illusions of direction and orientation. Two new group- measurement techniques, for the Poggendorff and Zoellner illusions, are presented. These are shown to be sensitive enough to detect the usually obtained parametric variations of illusion magnitude with specific changes in stimulus configurations.

Original languageEnglish (US)
Pages (from-to)219-222
Number of pages4
JournalBulletin of the Psychonomic Society
Issue number4
StatePublished - Apr 1979

All Science Journal Classification (ASJC) codes

  • Catalysis
  • General Chemistry

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