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The Medawar Lecture 2001 knowledge for vision: vision for knowledge.

Richard L Gregory1

  • 1Department of Experimental Psychology, University of Bristol, UK. richard.gregory@bris.ac.uk

Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
|September 9, 2005
PubMed
Summary

Vision evolves from passive reception to active perception and explicit conception, with innate and learned knowledge shaping sensory input. Illusions reveal hidden visual processes, highlighting vision's role in intelligence and scientific understanding.

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Area of Science:

  • Cognitive Science
  • Neuroscience
  • Evolutionary Biology

Background:

  • Perception evolves from passive reception to active processing and conceptual understanding.
  • Innate and learned knowledge are crucial for interpreting sensory signals.
  • Illusions offer insights into the normally hidden mechanisms of vision.

Discussion:

  • Distinguishes between physiological phenomena, general rules, and specific object knowledge in vision.
  • Proposes a classification of visual illusions, akin to a 'periodic table'.
  • Highlights the role of implicit knowledge in visual processing.

Key Insights:

  • Vision actively constructs meaning from sensory data using internal knowledge.
  • Misapplied or inappropriate knowledge leads to perceptual illusions.

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  • The evolutionary trajectory of perception is retained in later stages.

    • Outlook:

    • Further research into the 'periodic table' of illusions can elucidate visual processing.
    • Understanding implicit knowledge in vision is key to artificial intelligence.
    • Vision's role in explicit conceptualization, including scientific reasoning, is significant.