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

The role of attention in motion extrapolation: are moving objects 'corrected' or flashed objects attentionally

B Khurana1, K Watanabe, R Nijhawan

  • 1Division of Biology, California Institute of Technology, Pasadena 91125, USA. beena@cogs.susx.ac.uk

Perception
|October 21, 2000
PubMed
Summary

The flash-lag effect, where a flashed object appears to lag behind a moving one, is unaffected by attention. This visual phenomenon

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

Horse kick related injury: Significance of the line of impact.

Diagnostic and interventional imaging·2015
Same author

LIM proteins: association with the actin cytoskeleton.

Protoplasma·2002
Same author

Evidence of bovine non-group A rotavirus in diarrhoeic neonatal calves in India.

The Veterinary record·2001
Same author

Not to be and then to be: visual representation of ignored unfamiliar faces.

Journal of experimental psychology. Human perception and performance·2000
Same author

Risk factors for duodenal ulcer in north India.

Tropical gastroenterology : official journal of the Digestive Diseases Foundation·1999
Same author

Visual structure and the integration of form and color information.

Journal of experimental psychology. Human perception and performance·1998

Area of Science:

  • Cognitive Psychology
  • Visual Perception
  • Neuroscience

Background:

  • The flash-lag effect describes the apparent lag of a briefly flashed object when aligned with a moving object.
  • Previous research questioned if attentional delays contribute to the flash-lag effect.

Purpose of the Study:

  • To investigate whether attentional allocation influences the flash-lag effect.
  • To determine if the flash-lag effect is altered when attention is focused, distributed, or diverted.

Main Methods:

  • Experiment 1 & 2: Observers tracked single or multiple moving rings while a disk flashed within one ring under known/unknown conditions.
  • Experiment 3: A cueing paradigm assessed reaction times and flash-lag perception with valid/invalid cues.

Main Results:

Related Experiment Videos

  • The flash-lag effect remained significant and unaltered across all manipulated attentional conditions.
  • Reaction times were faster with valid cues, but this did not influence the flash-lag effect.
  • Faster responses are attributed to motor response facilitation, not perceptual changes.

Conclusions:

  • The visual computations underlying the flash-lag effect are independent of attentional deployment.
  • Attention does not modulate the perceptual processing that causes the flash-lag effect.