Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Visual perception of collinearity.

R H Cuijpers1, A M L Kappers, J J Koenderink

  • 1Helmholtz Instituut, Utrecht, The Netherlands.

Perception & Psychophysics
|June 7, 2002
PubMed
Summary
This summary is machine-generated.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Huggable integrated socially assistive robots: exploring the potential and challenges for sustainable use in long-term care contexts.

Frontiers in robotics and AI·2025
Same author

Influence of Local Properties on the Perception of Global Object Orientation.

IEEE transactions on haptics·2016
Same author

Method of stabilizing the retinal image.

Applied optics·2010
Same author

Visually Guided Haptic Search.

IEEE transactions on haptics·2010
Same author

Spatiotemporal contrast detection threshold surface is bimodal.

Optics letters·2009
Same author

Local Surface Orientation Dominates Haptic Curvature Discrimination.

IEEE transactions on haptics·2009
Same journal

Response organization in selective adaptation to speech sounds.

Perception & psychophysics·2014
Same journal

Reaction times to comparisons within and across phonetic categories.

Perception & psychophysics·2012
Same journal

Auditory and phonetic memory codes in the discrimination of consonants and vowels.

Perception & psychophysics·2012
Same journal

Simple and contingent adaptation effects for place of articulation in stop consonants.

Perception & psychophysics·2012
Same journal

Auditory property detectors and processing place features in stop consonants.

Perception & psychophysics·2012
Same journal

Visual working memory for line orientations and face identities.

Perception & psychophysics·2008
See all related articles

Visual space perception deviates from Euclidean geometry. Our study found visual collinearity perception differs from parallelity perception, suggesting task-dependent visual geometry.

Area of Science:

  • Visual perception
  • Geometry of visual space
  • Human psychophysics

Background:

  • Collinearity and parallelity are related in Riemannian geometry.
  • The relationship between collinearity and parallelity in visual space is not well understood.
  • Investigating visual space geometry requires understanding how humans perceive these concepts.

Purpose of the Study:

  • To investigate if collinearity in visual space is a special case of parallelity.
  • To determine the geometric properties of visual space perception.
  • To compare visual collinearity perception with visual parallelity perception.

Main Methods:

  • Subjects aligned two bars in a horizontal plane at eye height.
  • Distances of bars from the subject and their angles were systematically varied.

Related Experiment Videos

  • Deviations in perceived collinearity were measured and analyzed.

    • Main Results:

    • Observed deviations up to 22 degrees in visual collinearity perception.
    • Deviations were decomposable into components dependent on distance ratios and independent of position.
    • Deviations from parallelity in this task were smaller than in a previous parallelity task.

    Conclusions:

    • Visual collinearity perception does not follow the same geometric rules as parallelity perception.
    • The intrinsic geometry of visual space appears to be task-dependent.
    • This supports the operational definition of visual space geometry.