Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Search research articles

Related Experiment Videos

Amodal completion and localization.

H H Greene¹, J M Brown

¹Department of Psychology, University of Detroit Mercy, MI 48219-0900, USA. greenehh@udmercy.edu

Vision Research

|May 23, 2000

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

Eye movements and familiarity effects in visual search.

Vision research·2001

Same author

Eye-movement control in direction-coded visual search.

Perception·2001

Same author

Temporal relationships between eye fixations and manual reactions in visual search.

Acta psychologica·1999

Same author

Spatial interactions with real and gap-induced illusory lines in vernier acuity.

Vision research·1997

Same author

Resection of the right middle lobe and lingula for mycobacterial infection.

The Annals of thoracic surgery·1996

Same author

Cell status--dead or alive?

Nature medicine·1996

Same journal

Computational and mathematical models in vision: Quantitative approaches to understanding visual perception.

Vision research·2026

Same journal

Complex interactions between lightness, chroma, and hue in color ensemble perception.

Vision research·2026

Same journal

Driving with autism spectrum disorder: Exploring the impact of tactile hazard warnings on gaze behavior and hazard responses.

Vision research·2026

Same journal

Early visual processing in adults with ADHD: evidence from contrast sensitivity, spatial integration, and external noise.

Vision research·2026

Same journal

Pupil reflexes generate the peripheral drift illusion due to ON/OFF motion responses.

Vision research·2026

Same journal

Perceived direction of glass patterns can flip by 90°: A neural model.

Vision research·2026

See all related articles

Amodal completion of visual stimuli did not improve vernier acuity in a three-line task. However, amodally completed segments influenced line localization in a two-line task, suggesting early visual processing.

Area of Science:

Visual perception
Psychophysics
Computational neuroscience

Background:

Vernier acuity measures the ability to align lines.
Amodal completion is the perception of a whole object despite partial occlusion.
Previous studies on amodal completion's effect on Vernier acuity yielded conflicting results.

Purpose of the Study:

To investigate the influence of amodal completion on Vernier acuity.
To determine if amodally completed percepts affect line localization accuracy.
To reconcile conflicting findings in prior research.

Main Methods:

Participants performed three-line and two-line Vernier acuity tasks.
Stimuli included physically segmented lines designed to elicit amodal completion.

Related Experiment Videos

Localization accuracy and points of subjective equality were measured.

Main Results:

In the three-line task, amodal completion did not enhance accuracy.
In the two-line task, amodally completed segments significantly shifted perceived line position.
These findings suggest an early-onset representation influencing alignment but with poor positional tuning.

Conclusions:

Amodal completion can influence line localization, particularly when stimuli are segmented.
An early visual representation, possibly via interpolation, may underlie these effects.
The findings clarify previous discrepancies and propose a physiological basis for amodal completion's impact on spatial perception.