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

Pattern detection: interactions between oriented and concentric patterns.

Chien-Chung Chen1, John M Foley

  • 1Department of Psychology, National Taiwan University, Taipei 106, Taiwan.

Vision Research
|March 3, 2004
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

Sensation without perception: The white whale effect and perceptual blindness in autonomous vehicles.

Journal of vision·2026
Same author

Development of Central and Peripheral Vision and Visual Field Asymmetries from Preschoolers to Adults.

Annals of the New York Academy of Sciences·2026
Same author

Varieties of higher-order symmetry.

Perception·2026
Same author

Token-splitting improves GPT-4.1 performance on plastic surgery exams: implications for AI-Assisted medical education.

Medical education online·2025
Same author

The spatial and temporal properties of the contour erasure effect and perceptual filling-in.

Journal of vision·2025
Same author

Cortical activations for symmetry effect on visual word form perception in developmental dyslexia.

Scientific reports·2025
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

Visual perception of targets on pedestals was studied. Most target threshold vs. contrast functions showed a "dipper" shape, indicating complex inhibitory interactions in the visual system.

Area of Science:

  • Visual Neuroscience
  • Computational Neuroscience
  • Perception Psychology

Background:

  • Understanding visual perception requires characterizing how the visibility of a target is affected by surrounding stimuli.
  • Pedestal contrast functions, specifically target threshold vs. pedestal contrast (TvC), are crucial for probing inhibitory and facilitatory mechanisms in vision.

Purpose of the Study:

  • To investigate the shape of target threshold vs. pedestal contrast (TvC) functions for different target and pedestal orientations.
  • To evaluate a divisive inhibition model in explaining the observed TvC functions and identify potential visual mechanisms involved.

Main Methods:

  • Measured TvC functions using Gaussian-enveloped Gabor patches for vertical and concentric targets on vertical, horizontal, plaid, and concentric pedestals.

Related Experiment Videos

  • Fitted a divisive inhibition model with varying numbers of orientation-selective mechanisms to the empirical TvC data.

    • Main Results:

    • Most TvC functions exhibited a 'dipper' shape, where the target threshold initially decreases then increases with pedestal contrast.
    • A notable exception was the monotonically increasing TvC function for a vertical target on a horizontal pedestal.
    • A two-mechanism divisive inhibition model provided a reasonable fit, significantly improved by adding one or two more observer-specific mechanisms.

    Conclusions:

    • The 'dipper' shape in TvC functions suggests complex inhibitory interactions in visual processing.
    • The findings support a divisive inhibition model, with additional mechanisms potentially corresponding to oblique or concentric receptive fields.
    • Individual differences in visual mechanisms contribute to the observed variations in TvC functions.