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Adults spontaneously use quartile strategies for number line estimation (NLE) tasks. Providing more external benchmarks on the number line improved estimation accuracy and strategy use.

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Area of Science:

  • Cognitive Psychology
  • Educational Psychology

Background:

  • Number line estimation (NLE) tasks assess numerical understanding.
  • The spontaneous use of estimation strategies is not fully understood.

Purpose of the Study:

  • To investigate if adults spontaneously use quartile-based strategies in NLE tasks.
  • To determine if external benchmarks enhance strategy application and accuracy.

Main Methods:

  • Participants completed a 0-1,000 NLE task under three conditions: bounded, midpoint, and quartile benchmarks.
  • Verbal protocols were used to assess strategy use.

Main Results:

  • Participants spontaneously applied quartile strategies, even with limited benchmarks.
  • Estimation accuracy and strategy variety increased with more external benchmarks.
  • Performance was better for numbers near external benchmarks.

Conclusions:

  • The NLE task encourages sophisticated strategy use.
  • External benchmarks are valuable tools for improving numerical estimation skills.