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A memory-based account of automatic numerosity processing.

Jessica M Choplin1, Gordon D Logan

  • 1Vanderbilt University, Nashville, Tennessee, USA. jchoplin@depaul.edu

Memory & Cognition
|May 27, 2005
PubMed
Summary
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The size congruity effect in number processing is driven by memory associations, not comparisons between digits. This suggests automatic numerical cognition relies on learned attributes rather than explicit relational calculations.

Area of Science:

  • Cognitive Psychology
  • Numerical Cognition
  • Human Information Processing

Background:

  • The size congruity effect demonstrates that physical size influences numerical judgments.
  • Two main models explain this effect: algorithmic (relational comparison) and memory-based (attribute association).

Purpose of the Study:

  • To investigate the underlying mechanisms of the size congruity effect in automatic numerical processing.
  • To differentiate between algorithmic and memory-based explanations for the size congruity effect.

Main Methods:

  • Participants judged the relative physical sizes of digits and letters.
  • Congruity effects were measured using single digits paired with letters versus pairs of digits.

Main Results:

Related Experiment Videos

  • Congruity effects were equivalent whether digits were paired with letters or with other digits.
  • This outcome supports memory-based models over algorithmic models.

Conclusions:

  • Size congruity effects can arise without requiring explicit comparison algorithms.
  • Automatic processing of numerical information may rely on learned associations between stimuli and attributes.