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Pointing to numbers and grasping magnitudes
Martin H Fischer1, Helena Campens
1School of Psychology, University of Dundee, Dundee, DD1 4HN, Scotland, UK. m.h.fischer@dundee.ac.uk
Experimental Brain Research
|November 1, 2008
Summary
This study used spatial pointing and gesturing to investigate the mental number line. Findings show individual spatial number associations and support a linear representation of numerical magnitudes.
Area of Science:
- Cognitive psychology
- Neuroscience
- Psychophysics
Background:
- The cognitive representation of numbers is debated, particularly the metrical structure of the "mental number line".
- Chronometric methods have limitations in resolving this debate.
- Spatial behavior offers a novel approach to understanding numerical cognition.
Purpose of the Study:
- To investigate the spatial representation of numbers in adults.
- To explore the metrical structure of the mental number line using spatial behavior.
- To determine if spatial associations for numbers are idiosyncratic or universal.
Main Methods:
- Blindfolded adults described numerical locations by pointing.
- Participants gestured to represent numerical magnitudes.
- Unconstrained spatial behavior was recorded and analyzed.
Main Results:
- Idiosyncratic spatial associations for numbers were observed.
- Spatial behavior largely supports a linear representation of magnitudes.
- Pointing and gesturing revealed distinct spatial patterns for numbers and magnitudes.
Conclusions:
- Spatial behavior provides valuable insights into the mental number line.
- Numerical representation is influenced by individual spatial associations.
- A predominantly linear mental number line is supported by spatial data.
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