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Benchmark-based strategy use in atypical number lines.

Koen Luwel1, Dominique Peeters2, Goedele Dierckx1

  • 1Centre for Mathematics, Education, Econometrics and Statistics, KU Leuven.

Canadian Journal of Experimental Psychology = Revue Canadienne De Psychologie Experimentale
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Summary
This summary is machine-generated.

Atypical number line endpoints disrupt benchmark strategies, reducing number line estimation (NLE) accuracy in children and adults. This effect hinders performance by simplifying estimation patterns.

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Area of Science:

  • Cognitive Psychology
  • Developmental Psychology
  • Educational Psychology

Background:

  • Atypical endpoints on number lines negatively impact number line estimation (NLE) performance.
  • Previous research suggests potential disruption in benchmark determination ease.

Purpose of the Study:

  • Investigate if atypical endpoints disrupt benchmark ease and if this varies by age.
  • Examine the impact of atypical endpoints on NLE strategies and accuracy.

Main Methods:

  • 5th graders and adults completed NLE tasks in typical (0-1000) and atypical (367-1367) conditions.
  • Analyzed estimation accuracy and patterns using power models for different age groups.

Main Results:

  • NLE accuracy decreased in the atypical condition for both children and adults.
  • Benchmark estimation accuracy around 50% (children) and 25%, 50%, 75% (adults) was also reduced.
  • Estimation patterns shifted from complex to simpler power models in the atypical condition.

Conclusions:

  • Hindering benchmark strategies negatively affects NLE performance across age groups.
  • Findings highlight the importance of accessible benchmarks for effective number line estimation.
  • Adult NLE in typical conditions is best described by a 4-cycle power model.