A twin-case study of developmental number sense impairment
Affiliation.
- 1 a Institute of Education and Child Studies , Leiden University , Leiden , The Netherlands.
- PMID: 24479698
- DOI: 10.1080/02643294.2013.876980
The current study reports on 9-year-old monozygotic twin girls who fail to make any progress in learning basic mathematics in primary education. We tested the hypothesis that the twins' core maths problems were deficits in number sense that manifested as impairments in approximate and small number systems, resulting in impairment in nonsymbolic as well as in symbolic processing. While age-matched controls (eight typically developing girls) scored highly, the twins scored at chance on all number sense tasks. More specifically, on a nonsymbolic comparison task, even in the simplest ratio condition of 1:2, and on a subitizing task including only numbers under 4, the twins performed at chance and significantly below the same age control group. Responsiveness to an intervention promoting number sense is discussed. As differences between verbal and performance IQ suggest, there seems to be a high degree of specificity in the twins' developmental number sense delays. The concomitant impairments for visual-spatial processing and working memory in the twins might explain the failure to develop number sense.
Keywords: Approximate and small number system; Case study; Number sense impairment; Visual-spatial processing; Working memory..
Publication types
- Case Reports
- Dyscalculia / diagnosis
- Dyscalculia / etiology*
- Infant, Very Low Birth Weight*
- Intelligence*
- Mathematics*
- Memory, Short-Term
- Space Perception
- Twins, Monozygotic*
- Visual Perception
- Wechsler Scales
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A twin-case study of developmental number sense impairment
- Department of Learning Disabilities
Research output : Contribution to journal › Article › peer-review
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- Number Sense 100%
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- Typically Developing 16%
- Working Memory 16%
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- Primary Education 16%
- Visuospatial Processing 16%
- Monozygotic Twins 16%
- Math Problems 16%
- Subitizing 16%
- Age Control 16%
- Verbal IQ 16%
- Performance IQ 16%
- Simple Ratio 16%
- Sensing Delay 16%
- Basic Mathematics 16%
- Twin-core 16%
- Symbolic Processing 16%
- Number System 16%
- Core Maths 16%
- Case Study 100%
- Working Memory 100%
A twin-case study of developmental number sense impairment (Q50692267)
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The current study reports on 9-year-old monozygotic twin girls who fail to make any progress in learning basic mathematics in primary education. We tested the hypothesis that the twins' core maths problems were deficits in number sense that manifested as impairments in approximate and small number systems, resulting in impairment in nonsymbolic ...
As differences between verbal and performance IQ suggest, there seems to be a high degree of specificity in the twins' developmental number sense delays. The concomitant impairments for visual–spatial processing and working memory in the twins might explain the failure to develop number sense.
A twin-case study of developmental number sense impairment. January 2014; Cognitive Neuropsychology 31(3) ... case study of developmental number sense impairment, Cognitive Neuropsychology, 31:3, ...
A twin-case study of developmental number sense impairment. Sign in | Create an account. https://orcid.org. Europe PMC ...
Chapter 5 A twin-case study of developmental number sense impairment 78 79 . Abstract. The current study reports on 9-year-old monozygotic twin girls who fail to make any progress in learning basic mathematics in primary education. We tested the hypothesis that the twins’ core math problems were deficits in number sense
A twin-case study of developmental number sense impairment. ... Spatial structuring and the development of number sense: A case study of young children working with ...
A twin-case study of developmental number sense impairment ... Dive into the research topics of 'A twin-case study of developmental number sense impairment'. Together ...
scientific article published on 30 January 2014. A twin-case study of developmental number sense impairment. (Q50692267)
from publication: A twin-case study of developmental number sense impairment | The current study reports on 9-year-old monozygotic twin girls who fail to make any progress in learning basic ...
The hypothesis that the twins' core maths problems were deficits in number sense that manifested as impairments in approximate and small number systems, resulting in impairment in nonsymbolic as well as in symbolic processing was tested. The current study reports on 9-year-old monozygotic twin girls who fail to make any progress in learning basic mathematics in primary education. We tested the ...