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The new unbounded number line estimation task: A systematic literature review
Regina Miriam Reinert1, Korbinian Moeller2
1University of Tübingen, Tübingen, Germany.
Acta Psychologica
|August 2, 2021
Summary
The unbounded number line estimation task offers a purer measure of number magnitude representation. This review of 16 studies confirms its validity, despite methodological variations and some estimation biases.
Area of Science:
- Cognitive Psychology
- Numerical Cognition
- Psychometrics
Background:
- The traditional bounded number line estimation task has limitations.
- An unbounded version was introduced in 2011 to address these limitations.
- Evidence suggests the unbounded task may offer a purer measure of number magnitude representation.
Purpose of the Study:
- To systematically review and evaluate all studies utilizing the unbounded number line estimation task.
- To provide an overview of the current research landscape for this task.
- To assess the validity of the unbounded number line estimation task as a measure of numerical representation.
Main Methods:
- Systematic literature search conducted in May 2021 following PRISMA guidelines.
- Inclusion criteria identified 16 relevant studies employing the unbounded number line estimation task.
- Analysis of methodological differences, commonalities, and observed estimation biases.
Main Results:
- Significant methodological variations exist across studies (e.g., number range, display size).
- Five studies reported evidence of estimation biases within the unbounded task.
- Fourteen studies supported the hypothesis that the unbounded task is a more valid measure of number magnitude representation.
Conclusions:
- The unbounded number line estimation task shows promise as a purer measure of numerical magnitude representation.
- Despite methodological heterogeneity and some biases, the task's validity is largely supported by existing research.
- Further standardization may enhance the reliability and comparability of findings across studies.
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