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

A representational vertical bias

T J Jeerakathil1, A Kirk

  • 1Department of Medicine, University of Saskatchewan, Saskatoon, Canada.

Neurology
|April 1, 1994
PubMed
Summary
This summary is machine-generated.

Normal subjects exhibit an upward bias when bisecting lines, influenced by both internal "top" representations and visual field location. This bias is evident in vertical, horizontal, and downward-radial lines but not upward-radial ones.

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

Defining the Clinical Target Volume in Postoperative Thymic Epithelial Tumours - A Clinical Practice Guide for UK Clinical Oncologists.

Clinical oncology (Royal College of Radiologists (Great Britain))·2025
Same author

Survival following lung volume reduction procedures: results from the UK Lung Volume Reduction (UKLVR) registry.

BMJ open respiratory research·2024
Same author

Initial progress of the magnetic diagnostics of the MAST-U tokamak.

The Review of scientific instruments·2023
Same author

Can digital health apps provide patients with support to promote structured diabetes education and ongoing self-management? A real-world evaluation of myDiabetes usage.

Digital health·2023
Same author

Fission chamber data acquisition system for neutron flux measurements on the Mega-Amp Spherical Tokamak Upgrade.

The Review of scientific instruments·2022
Same author

Prediction of venous thromboembolism using clinical and serum biomarker data from a military cohort of trauma patients.

BMJ military health·2020

Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Visual Perception

Background:

  • Normal subjects often display an upward bias when bisecting lines.
  • This phenomenon is particularly noted in vertical and radial line bisection tasks.
  • Understanding the underlying mechanisms of this bias is crucial for visual perception research.

Purpose of the Study:

  • To investigate the separable components contributing to the upward bias in line bisection.
  • To determine if representational and visual field factors independently or interactively influence this bias.
  • To examine how directional labels and line orientation affect bisection accuracy.

Main Methods:

  • Twelve healthy participants performed line bisection tasks with vertical, radial, and horizontal lines.

Related Experiment Videos

  • Directional labels ('TOP', 'BOTTOM') were placed at line ends.
  • Bisection points were recorded under various conditions, including lines above and below eye level.

    • Main Results:

    • A significant upward bias towards the 'TOP' label was observed in horizontal, vertical, and radial-down conditions.
    • No upward bias was found in the radial-up condition.
    • In horizontal lines, the direction of misbisection varied based on the 'TOP' label's position (left or right).
    • Two distinct biases were identified: one towards an internal 'top' representation and another towards the upper visual field, with the latter dominating when opposed.

    Conclusions:

    • The upward bias in line bisection is not monolithic but comprises distinct representational and visual field-based components.
    • Verbal labels and visual field location interact to influence spatial judgments.
    • These findings enhance our understanding of spatial cognition and visual processing in healthy individuals.