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Related Experiment Videos

Visual cognition: a new look at the two-visual systems model.

M Jeannerod1, P Jacob

  • 1Institut des Sciences Cognitives, Lyon, France. jeannerod@isc.cnrs.fr

Neuropsychologia
|February 15, 2005
PubMed
Summary

Visual representations require direction of fit, causation, and conceptual content for valid comparison. These properties differentiate perception from action, re-evaluating visual pathways like the dorsal stream.

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Area of Science:

  • Cognitive Neuroscience
  • Visual Perception
  • Philosophy of Mind

Background:

  • Visual representations are fundamental to cognition, but their comparison requires specific properties.
  • Existing models often overlook the nuanced interplay between conceptual content, direction of fit, and causation in visual processing.

Purpose of the Study:

  • To establish criteria for valid comparisons between visual representations.
  • To elucidate the roles of direction of fit, direction of causation, and conceptual content in visual cognition.
  • To re-evaluate the functional segregation within the dorsal and ventral visual pathways.

Main Methods:

  • Conceptual analysis of visual representation properties.
  • Examination of semantic and pragmatic processing in visual input.

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  • Re-interpretation of neuroanatomical data on the parietal lobe and visual pathways.

    • Main Results:

    • Valid comparison of visual representations necessitates considering direction of fit, causation, and conceptual content.
    • Conceptual content is contingent on processing level, linking early visual input to minimal content and higher-order cognition to rich content.
    • Semantic processing exhibits mind-to-world fit and world-to-mind causation, while pragmatic processing (intentions) shows world-to-mind fit and mind-to-world causation.
    • The dorsal pathway, particularly the parietal lobe, is functionally heterogeneous, with distinct roles for superior and inferior lobules in visuomotor processing, spatial perception, and goal-directed action.

    Conclusions:

    • The properties of direction of fit and causation critically distinguish representations for perception from those for action.
    • A revised understanding of the dorsal stream, including the parietal lobe's subdivisions, is necessary.
    • The findings offer a framework for understanding how visual information is processed for both understanding the world and interacting with it.