Are the original Roelofs effect and the induced Roelofs effect caused by the same shift in straight ahead?

D. D J De Grave*, Eli Brenner, J. B J Smeets

*Corresponding author for this work

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

We investigated whether the original Roelofs effect and the induced Roelofs effect are caused by the same shift in perceived straight ahead. Subjects were presented with a target within a frame in complete darkness. Target and frame could both be shifted to the left or right of objective straight ahead. On separate trials, subjects gave verbal estimates about the position of either the target or the frame. The eccentricity of the frame was underestimated (the original Roelofs effect). However, the perceived position of the target did not follow this misjudgement of the eccentricity of the frame (the induced Roelofs effect was not present). Thus, it is unlikely that both effects have a common origin in misjudging egocentric straight ahead.

Original languageEnglish
Pages (from-to)2279-2285
Number of pages7
JournalVision Research
Volume42
Issue number19
DOIs
Publication statusPublished - Sep 2002

Keywords

  • Action
  • Direction
  • Illusion
  • Localization
  • Perception

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