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

A binocular site for contrast-modulated masking.

J M Harris1, A Willis

  • 1Department of Psychology, Ridley Building, University of Newcastle, Claremont Place, NE1 7RU, Newcastle Upon Tyne, UK.

Vision Research
|March 15, 2001
PubMed
Summary

Contrast-modulated (CM) gratings mask visual target detection. This study shows CM masking occurs after initial visual processing stages, not solely in monocular channels, indicating later binocular combination involvement.

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

Numerical assessments of geometry, proximity and multi-electrode effects on electroporation in mitochondria and the endoplasmic reticulum to nanosecond electric pulses.

Scientific reports·2024
Same author

Time to STEP UP: methods and findings from the development of guidance to help researchers design inclusive clinical trials.

BMC medical research methodology·2024
Same author

Decompressive craniectomy to cranioplasty: a retrospective observational study using Hospital Episode Statistics in England.

BMJ surgery, interventions, & health technologies·2024
Same author

Long-term stability of the genome structure of the cyanobacterium, Dolichospermum in a deep German lake.

Harmful algae·2024
Same author

Multinational comparison study of aircraft pilot healthcare avoidance behaviour.

Occupational medicine (Oxford, England)·2023
Same author

Hard to reach? Language matters when describing populations underserved by health and social care research.

Public health·2022

Area of Science:

  • Visual perception
  • Neuroscience
  • Psychophysics

Background:

  • Contrast-modulated (CM) gratings mask visual targets, but the underlying neural mechanisms are not fully understood.
  • Previous research suggests luminance-modulated (LM) masking involves later stages of visual processing.

Purpose of the Study:

  • To investigate whether contrast-modulated (CM) grating masking of a low spatial frequency test grating occurs in monocular channels or after binocular combination.
  • To compare CM masking with luminance-modulated (LM) masking to understand shared or distinct processing pathways.

Main Methods:

  • Participants detected a 1 cycle deg(-1) test grating under various masking conditions: dichoptic CM, dichoptic variant CM, and binocular CM.
  • Threshold elevations were measured for CM masks and compared to LM masks of similar contrast and spatial frequency.

Related Experiment Videos

  • Stimuli were presented to one or both eyes to differentiate monocular versus binocular processing stages.

    • Main Results:

    • Dichoptic CM masking (mask components to one eye, test to the other) produced threshold elevations similar to or greater than binocular CM masking.
    • Presenting CM mask components to separate eyes (dichoptic variant) did not result in masking, indicating a need for binocular interaction.
    • LM masking also showed significant threshold elevations under dichoptic presentation.

    Conclusions:

    • Contrast-modulated (CM) masking, like LM masking, does not rely solely on monocular visual channels.
    • The site of CM masking occurs after the initial stages of binocular combination, likely involving later stages of visual processing.
    • Findings support the hypothesis that CM masking is contingent on stereo matching, placing it late in the visual processing hierarchy.