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Article
The influence of exploration mode, orientation, and configuration on the haptic Mu« ller-Lyer illusion
Perception (2005)
  • Morton A. Heller, Eastern Illinois University
  • Melissa McCarthy, Eastern Illinois University
  • Jennifer Schultz, Eastern Illinois University
  • Jayme Green, Eastern Illinois University
  • Melissa Shanley, Eastern Illinois University
  • Ashley Clark, Eastern Illinois University
  • Samantha Skoczlyas, Eastern Illinois University
  • Jamie Prociuk, Eastern Illinois University
Abstract

We studied the impact of manner of exploration, orientation, spatial position, and configuration on the haptic Mu« ller-Lyer illusion. Blindfolded sighted subjects felt raised-line Mu« ller-Lyer and control stimuli. The stimuli were felt by tracing with the index finger, free exploration, grasping with the index finger and thumb, or by measuring with the use of any two or more fingers. For haptic judgments of extent a sliding tangible ruler was used. The illusion was present in all exploration conditions, with overestimation of the wings-out compared to wings-in stimuli. Tracing with the index finger reduced the magnitude of the illusion. However, tracing and grasping induced an overall underestimation of size. The illusion was greatly attenuated when stimuli were felt with the index fingers of both hands. Illusory misperception was not altered by the position in space of the Mu« ller-Lyer stimuli. No effects of changes in the thickness of the line shaft were found, but there were effects of the length of the wing endings for the smaller, 5.1 cm stimuli. The theoretical and practical implications of the results are discussed.

Keywords
  • manner of exploration,
  • orientation,
  • spatial position,
  • configuration,
  • Mu« ller-Lyer illusion,
  • psychology
Disciplines
Publication Date
2005
Citation Information
Morton A. Heller, Melissa McCarthy, Jennifer Schultz, Jayme Green, et al.. "The influence of exploration mode, orientation, and configuration on the haptic Mu« ller-Lyer illusion" Perception Vol. 34 (2005)
Available at: http://works.bepress.com/morton_heller/3/