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

Probing unconscious visual processing with the McCollough effect

G K Humphrey1, M A Goodale

  • 1Department of Psychology, The University of Western Ontario, London, Ontario, Canada N6A 5C2. keith@julian.uwo.ca

Consciousness and Cognition
|October 27, 1998
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

Weightlifting exercise and the size-weight illusion.

Attention, perception & psychophysics·2013
Same author

Neural correlates of motion processing through echolocation, source hearing, and vision in blind echolocation experts and sighted echolocation novices.

Journal of neurophysiology·2013
Same author

The nature and limits of orientation and pattern processing supporting visuomotor control in a visual form agnosic.

Journal of cognitive neuroscience·2013
Same author

What is the best fixation target? The effect of target shape on stability of fixational eye movements.

Vision research·2012
Same author

Near, far, or in between?-Target edges and the transport component of prehension.

Journal of motor behavior·2009
Same author

Susceptibility to startle during ongoing behaviour following collicular lesions in the rat.

Neuroscience letters·2009
Same journal

When one part feels, the whole belongs: associations between local touch referral and illusory full-limb ownership in individuals with leg amputation.

Consciousness and cognition·2026
Same journal

Inhibitory control and mind wandering; more difficult inhibition decreases mind wandering, within limits.

Consciousness and cognition·2026
Same journal

Autism and Aphantasia.

Consciousness and cognition·2026
Same journal

Absolute pitch and sound-color synesthesia provide for unique learning opportunities.

Consciousness and cognition·2026
Same journal

Could we perceive the world differently than we do? Neuroscience-based emergentism and the biological function of consciousness.

Consciousness and cognition·2026
Same journal

Motivational intensity in positive emotion and observation-based false memory: the role of action simulation.

Consciousness and cognition·2026
See all related articles

The McCollough effect, a visual illusion, suggests early brain processing occurs without conscious awareness. This research probes visual system operations, indicating conscious experience originates beyond initial visual cortex areas.

Area of Science:

  • Neuroscience
  • Psychophysics
  • Visual Perception

Background:

  • The McCollough effect is an orientation-contingent color aftereffect studied for over 30 years.
  • Aftereffects are used to investigate brain operations psychophysically.
  • This review synthesizes psychophysical, neuropsychological, and neuroimaging research on the McCollough effect.

Observation:

  • Evidence suggests the McCollough effect relies on neural mechanisms in early cortical visual pathways, likely in V1.
  • The aftereffect can be induced even without conscious perception of the stimulus patterns.
  • This challenges traditional views of visual processing and conscious awareness.

Findings:

  • The McCollough effect is strongly linked to early visual processing in the brain.

Related Experiment Videos

  • Unconscious visual processing plays a significant role in this phenomenon.
  • Neural mechanisms in V1 are implicated in the McCollough effect.

    • Implications:

    • Conscious visual experience may originate in higher cortical areas beyond V1.
    • This research provides insights into the neural basis of conscious perception.
    • Understanding the McCollough effect can inform theories of visual information processing and awareness.