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

Masks reveal processing time for alignment across space.

Sarah J Waugh1

  • 1Anglia Vision Research, Anglia Ruskin University, Cambridge CB1 1PT, UK. s.j.waugh@anglia.ac.uk

Vision Research
|July 7, 2007
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

Development of Crowding Distance in Children Is Faster and Later Than Visual Acuity and Better Predicts Reading Performance.

Investigative ophthalmology & visual science·2026
Same author

Development of visual acuity and spatial interactions for luminance- and contrast-modulated symbols, pictures and letters.

Vision research·2026
Same author

Landolt C-Tests With "Fixed" Arcmin Separations Detect Amblyopia But Underestimate Crowding in Moderate-to-Severe Amblyopic Children and Adults.

Investigative ophthalmology & visual science·2024
Same author

Impact of blur on clinical and occupational colour vision test results.

Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians (Optometrists)·2024
Same author

Coloured filters can simulate colour deficiency in normal vision but cannot compensate for congenital colour vision deficiency.

Scientific reports·2022
Same author

Contrast-modulated stimuli produce more superimposition and predominate perception when competing with comparable luminance-modulated stimuli during interocular grouping.

Scientific reports·2020
Same journal

Editorial for VSI Amblyopia: Advances in Amblyopia Research.

Vision research·2026
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
See all related articles

Precise alignment judgments require processing time, especially when lines are spatially separated. A post-mask significantly improves alignment thresholds over time, suggesting a higher-order visual processing stage.

Area of Science:

  • Visual perception
  • Cognitive psychology
  • Computational neuroscience

Background:

  • Precise alignment judgments are crucial for visual tasks like shape analysis.
  • The temporal dynamics of spatial alignment perception are not fully understood.
  • Investigating the role of processing time and masking in alignment perception.

Purpose of the Study:

  • To determine if spatial separation necessitates a processing time for accurate alignment.
  • To quantify the effect of exposure duration and post-masking on alignment thresholds.
  • To explore the underlying mechanisms of alignment refinement over time.

Main Methods:

  • Measuring alignment thresholds for separated lines across exposure durations (27-500ms).
  • Utilizing post-masks to control visibility and isolate temporal effects.

Related Experiment Videos

  • Comparing performance with and without post-masks.

    • Main Results:

    • Alignment thresholds improved significantly with time in the presence of a post-mask, following a square-root function.
    • Without a post-mask, temporal effects on alignment thresholds were less pronounced.
    • Threshold improvement was not attributable to changes in spatial scale over time.

    Conclusions:

    • Spatial separation imposes a processing time requirement for precise alignment.
    • A post-mask facilitates temporal refinement of spatial alignment information.
    • A higher-order visual processing stage appears to be involved in refining relative position information up to 200ms.