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Expert chess memory: revisiting the chunking hypothesis

F Gobet1, H A Simon

  • 1Carnegie Mellon University, USA.

Memory (Hove, England)
|August 26, 1998
PubMed
Summary
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Chess experts store thousands of chunks (patterned clusters of pieces) in long-term memory, explaining their superior recall. This study validates chunking theory and explores larger chunk sizes in masters.

Area of Science:

  • Cognitive Psychology
  • Expert Performance Research

Background:

  • Chess expertise is often explained by the chunking theory, proposed by Chase and Simon (1973).
  • This theory posits that experts store vast numbers of 'chunks' (meaningful patterns) in long-term memory.

Purpose of the Study:

  • To experimentally re-examine and validate the chunking theory of chess expertise.
  • To investigate the psychological reality and robustness of chunk boundaries.

Main Methods:

  • Experimental re-examination of chess position recall and copying tasks.
  • Analysis of piece placement latencies and inter-piece relationships.
  • Comparison of current data with Chase and Simon's (1973) findings.

Main Results:

Related Experiment Videos

  • High correlation found between current experimental data and Chase and Simon's (1973) results.
  • The two-second inter-chunk interval proved a robust measure for chunk boundaries.
  • Evidence suggests Masters utilize larger chunks than previously documented.

    • Conclusions:

    • The chunking theory of chess expertise is supported by experimental evidence.
    • Chunks possess psychological reality, and chunking theory can be extended.
    • Retrieval structures, or templates, in long-term memory may account for larger chunk sizes observed in Masters.