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Related Experiment Videos

Working memory in spelling: Evidence from backward typing.

Elisabet Service1, Raija Turpeinen

  • 1University of Helsinki, Finland.

Memory (Hove, England)
|December 19, 2001
PubMed
Summary

This study explored working memory limitations in spelling. Findings suggest the graphemic buffer handles about three letters at once, using different coding strategies for short versus long words.

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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Linguistics

Background:

  • Spelling theories propose a working memory system (graphemic buffer) for letter order and identity.
  • Investigating the capacity limitations of this graphemic buffer is crucial for understanding spelling processes.

Purpose of the Study:

  • To explore the capacity limitations of the graphemic buffer during spelling.
  • To determine how word length and articulatory suppression affect graphemic buffer usage.

Main Methods:

  • Participants typed words backwards, with pauses indicating graphemic buffer refreshes.
  • Word length was varied (5-8 letters), and articulatory suppression and foot tapping were employed.

Main Results:

  • Major pauses divided words into chunks of approximately three letters, often coinciding with syllables.
  • Articulatory suppression affected performance only for longer words (7-8 letters), not shorter ones.
  • Forward typing revealed similar pause patterns, supporting chunking mechanisms.

Conclusions:

  • The graphemic buffer appears to handle chunks of about three letters.
  • Short words may use non-phonological coding, while longer words utilize phonological codes for tracking progress.

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