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Related Experiment Video

Updated: Jul 6, 2026

Measuring Attention and Visual Processing Speed by Model-based Analysis of Temporal-order Judgments

Measuring Attention and Visual Processing Speed by Model-based Analysis of Temporal-order Judgments

Published on: January 23, 2017

Spatial attentional bias in normal people: object or viewer-centered.

Valeria Drago¹, Gregory P Crucian, David B FitzGerald

¹Department of Neurology and Center for Neuropsychological Studies, University of Florida College of Medicine and Neurology Service, Gainesville, FL 32610-0236, USA. valeria.drago@neurology.ufl.edu

Cortex; a Journal Devoted to the Study of the Nervous System and Behavior

|April 5, 2008

Summary

Normal subjects exhibit a distal bias when bisecting radial lines. This study supports a body-centered hypothesis, indicating bias increases with proximity to the midsagittal plane.

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Last Updated: Jul 6, 2026

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Investigating the Deployment of Visual Attention Before Accurate and Averaging Saccades via Eye Tracking and Assessment of Visual Sensitivity

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Published on: March 18, 2019

Area of Science:

Neuroscience
Perception Psychology
Human Factors

Background:

Individuals often exhibit a systematic distal bias when bisecting radial lines.
Existing hypotheses include object-centered, retinotopic, and body-centered attentional biases.

Purpose of the Study:

To investigate the underlying mechanisms of distal bias in radial line bisection.
To test object-centered, retinotopic, and body-centered hypotheses.

Main Methods:

Normal subjects bisected radial lines presented in a clockwise distribution below eye level.
Line orientation varied relative to the body's midsagittal plane.

Main Results:

Perception of the midpoint shifted systematically with line orientation.
A progressively greater distal bias was observed as lines approached the midsagittal plane.

Conclusions:

Findings support the body-centered hypothesis for distal bias in radial line bisection.
Distal bias is influenced by the body-centered orientation of visual stimuli.