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Numerical cognition is resilient to dramatic changes in early sensory experience
Shipra Kanjlia1, Lisa Feigenson1, Marina Bedny1
1Department of Psychological and Brain Sciences, Johns Hopkins University, United States.
Cognition
|June 24, 2018
Summary
The approximate number system (ANS) and symbolic math skills are intrinsically linked, even in individuals blind from birth. This suggests mathematical abilities are not dependent on visual experience.
Area of Science:
- Cognitive Science
- Neuroscience
- Developmental Psychology
Background:
- Humans and animals can estimate large quantities without counting, using noisy approximate number representations.
- Numerate individuals possess a separate system for exact quantities, crucial for formal mathematics.
- The link between approximate number and symbolic math skills is debated, with theories suggesting direct or indirect (via vision) connections.
Purpose of the Study:
- To investigate whether the link between approximate number and symbolic math abilities is dependent on visual experience.
- To examine these abilities in congenitally blind individuals.
Main Methods:
- Congenitally blind and blindfolded sighted participants completed auditory numerical approximation and symbolic arithmetic tasks.
- Non-math control tasks were also administered.
Main Results:
- The precision of approximate number representations was equivalent in both congenitally blind and sighted groups.
- The relationship between numerical approximation precision and symbolic math ability was maintained in congenitally blind individuals.
Conclusions:
- The development of the Approximate Number System (ANS) does not rely on visual input.
- The ANS and symbolic math abilities are intrinsically interconnected, independent of visual processing.
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