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Different cognitive processes in two image-scanning paradigms.

Grégoire Borst1, Stephen M Kosslyn, Michel Denis

  • 1LIMSI-CNRS, Université de Paris-Sud, Orsay, France. gregoire.borst@limsi.fr

Memory & Cognition
|August 29, 2006
PubMed
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Mental image scanning involves distinct processes. Experiments show that scanning visualized objects uses either transformational or attentional processes, impacting scanning time differently.

Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Human Perception

Background:

  • Mental image scanning is often viewed as a singular cognitive process.
  • This process is assumed to enable attention shifts across visualized objects.
  • The underlying mechanisms of mental image scanning require further investigation.

Purpose of the Study:

  • To investigate whether mental image scanning is a unified process.
  • To differentiate the cognitive mechanisms involved in mental image scanning.
  • To compare scanning processes across different experimental paradigms.

Main Methods:

  • Three experiments were conducted, adapting tasks from Kosslyn et al. (1978) and Finke and Pinker (1982).
  • Participants scanned identical dot array images across both task types.

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  • Scanning times and relationships between distance and time were analyzed.

    • Main Results:

    • Participants exhibited longer scanning times in the Kosslyn et al. (1978) paradigm compared to the Finke and Pinker (1982) paradigm.
    • Correlational analyses showed no consistent relationship in the rate of scanning time increase with distance between the two paradigms.
    • Distinct scanning patterns emerged, suggesting different underlying cognitive processes.

    Conclusions:

    • Mental image scanning is not a single process; it involves distinct mechanisms.
    • The Kosslyn et al. (1978) paradigm primarily utilizes transformational processes for scanning.
    • The Finke and Pinker (1982) paradigm primarily relies on attentional processes for scanning.