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

Different mechanisms may underlie the performance in relative localization tasks

N Bocheva1, N Yakimoff

  • 1Institute of Physiology, Bulgarian Academy of Sciences, Sofia, Bulgaria.

Vision Research
|August 1, 1996
PubMed
Summary

This study investigated visual perception by having participants adjust stimuli within a circle. Accuracy varied with stimulus properties under one instruction but remained constant under another, suggesting different localization mechanisms.

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

The contributions of slant and tilt to the detection of local surface orientation in structure from motion.

Vision research·2000
Same author

Perceptual grouping of strip dot patterns.

Acta physiologica et pharmacologica Bulgarica·1999
Same author

Perceived location of two-dimensional patterns.

Vision research·1993
Same author

The relative roles of vertices and sides in determining perceptual centres within shapes.

Acta neurobiologiae experimentalis·1993
Same author

Model of visual localization.

Acta neurobiologiae experimentalis·1993
Same author

Perceptual constancy during ocular pursuit: a quantitative estimation procedure.

Perception & psychophysics·1991

Area of Science:

  • Visual perception
  • Spatial cognition
  • Human psychophysics

Background:

  • Understanding how humans perceive and localize objects in space is fundamental to visual science.
  • Previous models of relative localization suggest accuracy depends on stimulus characteristics.

Purpose of the Study:

  • To investigate the influence of different instructions on the accuracy of visual stimulus localization.
  • To explore how stimulus properties (size, shape, type) affect relative localization under varying task demands.

Main Methods:

  • Two groups of participants adjusted 2D stimuli (dot patterns, contour figures) within a reference circle.
  • Two instructions were used: matching centers versus simple central positioning.
  • Control experiments assessed the determination of stimulus and circle centers.

Related Experiment Videos

Main Results:

  • Under the 'match centers' instruction, localization accuracy varied significantly with stimulus size, shape, and type.
  • Under the 'simple central positioning' instruction, accuracy remained invariant across different stimuli.
  • Results align with existing models of relative localization for the first instruction.

Conclusions:

  • The findings suggest that distinct early-stage mechanisms may underlie relative localization depending on task instructions.
  • The invariance of accuracy under simple positioning implies a more robust or different localization process.
  • Further research is needed to elucidate the specific neural and cognitive mechanisms involved.