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

Direction identification thresholds for second-order motion in central and peripheral vision

A T Smith1, R F Hess, C L Baker

  • 1Vision Research Unit, School of Psychology, University of Wales College of Cardiff.

Journal of the Optical Society of America. A, Optics, Image Science, and Vision
|February 1, 1994
PubMed
Summary

This study investigated how the human visual system detects motion. Results suggest that first-order and second-order motion detection may use shared mechanisms or principles.

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

Malignant transformation in a cohort of patients with oral epithelial dysplasia.

The British journal of oral & maxillofacial surgery·2021
Same author

Three changes to reduce the loss of dual degree trainees from OMFS national specialty selection in the UK: evidence based proposals.

The British journal of oral & maxillofacial surgery·2021
Same author

Connectivity of the Cingulate Sulcus Visual Area (CSv) in Macaque Monkeys.

Cerebral cortex (New York, N.Y. : 1991)·2020
Same author

Hyperexcitability of brain stem pathways in cerebral palsy.

Journal of neurophysiology·2018
Same author

Measuring health-related benefit and quality of care in oral and maxillofacial surgery: British Association of Oral and Maxillofacial Surgeons Outcomes Project.

The British journal of oral & maxillofacial surgery·2018
Same author

Interocular interaction of contrast and luminance signals in human primary visual cortex.

NeuroImage·2017

Area of Science:

  • Visual Neuroscience
  • Perception Psychology

Background:

  • Distinguishing between first-order (luminance-defined) and second-order (contrast-modulated) motion perception is crucial for understanding visual processing.
  • Previous research has yielded conflicting evidence regarding shared or distinct detection principles.

Purpose of the Study:

  • To investigate whether first-order and second-order motion are detected by common or separate mechanisms.
  • To measure direction identification thresholds for second-order motion patterns across various speeds and spatial frequencies.

Main Methods:

  • Measured direction identification thresholds for contrast-modulated noise patterns.
  • Assessed thresholds at different viewing eccentricities (fovea and periphery).
  • Simultaneously measured thresholds for simple modulation detection and orientation identification.

Related Experiment Videos

Main Results:

  • Direction identification thresholds for second-order motion were comparable to orientation identification thresholds.
  • Sensitivity to contrast-modulated patterns decreased with eccentricity, similar to luminance gratings.
  • Thresholds for direction identification were slightly higher than for simple detection.

Conclusions:

  • The findings support the hypothesis of a common motion detection mechanism for both first-order and second-order motion.
  • Alternatively, distinct mechanisms may employ a shared underlying principle for motion detection.
  • Visual system's processing of motion is more unified than previously assumed.