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

Directional motion sensitivity under transparent motion conditions

F A Verstraten1, R E Fredericksen, R J van Wezel

  • 1Vision Sciences Laboratory, Harvard University, Cambridge, MA 02138, USA. frans@wjh.harvard.edu

Vision Research
|August 1, 1996
PubMed
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

The motion aftereffect.

Trends in cognitive sciences·2011
Same author

A gain-control model relating nulling results to the duration of dynamic motion aftereffects.

Vision research·2003
Same author

Temporal detection in human vision: dependence on eccentricity.

Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians (Optometrists)·2002
Same author

Spatio-temporal tuning of motion coherence detection at different luminance levels.

Vision research·2002
Same author

Systematic eye movements do not account for the perception of motion during attentive tracking.

Vision research·2001
Same author

Visual motion and the human brain: what has neuroimaging told us?

Acta psychologica·2001

Visual motion perception is complex. High or low background speeds can inhibit detecting foreground patterns, while intermediate speeds systematically affect detection across various foreground speeds.

Area of Science:

  • Visual neuroscience
  • Perception psychology
  • Motion detection

Background:

  • Understanding visual motion perception is crucial for explaining how the brain processes complex visual scenes.
  • Transparent motion, where multiple layers of motion are perceived simultaneously, presents a significant challenge to visual processing.
  • Previous methods for assessing motion sensitivity, like Dmax and Dmin, offer limited insights into speed interactions.

Purpose of the Study:

  • To investigate the suppressive and facilitatory effects of background motion on foreground motion detection.
  • To analyze these effects across a wide range of speeds, not just motion thresholds.
  • To introduce a more comprehensive multi-step paradigm for evaluating motion interactions.

Main Methods:

  • Employing a multi-step paradigm to measure directional sensitivity to a foreground pattern.

Related Experiment Videos

  • Introducing an orthogonally directed background pattern under transparent motion conditions.
  • Varying speeds for both foreground and background patterns between 0.5 and 28 degrees per second.

    • Main Results:

    • High background speeds were found to inhibit the detection of high foreground speeds.
    • Low background speeds inhibited the detection of low foreground speeds.
    • Intermediate background speeds exhibited a systemic inhibitory effect on both low and high foreground speed detection.

    Conclusions:

    • Background motion significantly influences foreground motion detection, with speed playing a critical role.
    • The observed inhibitory effects are dependent on the relative speeds of foreground and background patterns.
    • The multi-step paradigm provides a more nuanced understanding of motion interactions in the visual system.