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

Pointing movements are affected by size-contrast illusions.

P van Donkelaar1

  • 1Department of Exercise and Movement Science, University of Oregon, Eugene 97403-1240, USA. paulvd@darkwing.uoregon.edu

Experimental Brain Research
|May 14, 1999
PubMed
Summary

Perceived target size significantly affects pointing movements. Longer movement times occurred for visually smaller targets, indicating visual perception heavily influences motor control in pointing tasks.

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

Sub-concussive trauma, acute concussion, and history of multiple concussions: Effects on quiet stance postural control stability.

International journal of psychophysiology : official journal of the International Organization of Psychophysiology·2018
Same author

Repetitive Transcranial Magnetic Stimulation of the Primary Somatosensory Cortex Modulates Perception of the Tendon Vibration Illusion.

Perceptual and motor skills·2016
Same author

Attentional deficits in concussion.

Brain injury·2005
Same author

Transcranial magnetic stimulation disrupts eye-hand interactions in the posterior parietal cortex.

Journal of neurophysiology·2000
Same author

Eye-hand coordination to visual versus remembered targets.

Experimental brain research·2000
Same author

The role of proprioception and attention in a visuomotor adaptation task.

Experimental brain research·2000

Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Motor Control

Background:

  • The Ebbinghaus illusion demonstrates how surrounding context influences perceived target size.
  • Understanding visual perception's role in motor actions is crucial for explaining human behavior.

Purpose of the Study:

  • To investigate the impact of perceived target size on pointing movement characteristics.
  • To determine if relative or absolute target size is more influential in pointing.

Main Methods:

  • Utilized the Ebbinghaus (or Titchener) circles illusion to manipulate perceived target size.
  • Measured movement times for open-loop pointing responses to targets with varying perceived sizes.

Main Results:

  • Pointing movement times were significantly longer for perceptually smaller targets compared to perceptually larger ones.
  • Adjusting physical size to equalize perceived size resulted in equivalent movement times.
  • The effect of perceived size on pointing was comparable to that of actual physical size differences.

Conclusions:

  • Relative target size, as influenced by visual perception, plays a critical role in controlling pointing movements.
  • Pointing movements appear more sensitive to visual perceptual processing than grasping movements.

Related Experiment Videos