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An electro-physiological temporal principal component analysis of processing stages of number comparison in developmental dyscalculia

An electro-physiological temporal principal component analysis of processing stages of number comparison in developmental dyscalculia
An electro-physiological temporal principal component analysis of processing stages of number comparison in developmental dyscalculia
Developmental dyscalculia (DD) still lacks a generally accepted definition. A major problem is that the cognitive component processes contributing to arithmetic performance are still poorly defined. By a reanalysis of our previous event-related brain potential (ERP) data (Soltész et al., 2007) here our objective was to identify and compare cognitive processes in adolescents with DD and in matched control participants in one-digit number comparison. To this end we used temporal principal component analysis (PCA) on ERP data. First, PCA has identified four major components explaining the 85.8% of the variance in number comparison. Second, the ERP correlate of the most frequently used marker of the so-called magnitude representation, the numerical distance effect, was intact in DD during all processing stages identified by PCA. Third, hemispheric differences in the first temporal component and group differences in the second temporal component suggest executive control differences between DD and controls.
calculation impairment, distance effect, numerical cognition, ERP, PCA
0885-2014
473-485
Soltész, Fruzsina
cbc12e4b-9d6f-4c24-8203-47ae2bd8f470
Szűcs, Dénes
1020f888-a7ba-48b6-861a-42a7f6ff716c
Soltész, Fruzsina
cbc12e4b-9d6f-4c24-8203-47ae2bd8f470
Szűcs, Dénes
1020f888-a7ba-48b6-861a-42a7f6ff716c

Soltész, Fruzsina and Szűcs, Dénes (2009) An electro-physiological temporal principal component analysis of processing stages of number comparison in developmental dyscalculia. [in special issue: Atypical Development of Numerical Cognition] Cognitive Development, 24 (4), 473-485. (doi:10.1016/j.cogdev.2009.09.002).

Record type: Article

Abstract

Developmental dyscalculia (DD) still lacks a generally accepted definition. A major problem is that the cognitive component processes contributing to arithmetic performance are still poorly defined. By a reanalysis of our previous event-related brain potential (ERP) data (Soltész et al., 2007) here our objective was to identify and compare cognitive processes in adolescents with DD and in matched control participants in one-digit number comparison. To this end we used temporal principal component analysis (PCA) on ERP data. First, PCA has identified four major components explaining the 85.8% of the variance in number comparison. Second, the ERP correlate of the most frequently used marker of the so-called magnitude representation, the numerical distance effect, was intact in DD during all processing stages identified by PCA. Third, hemispheric differences in the first temporal component and group differences in the second temporal component suggest executive control differences between DD and controls.

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Published date: 2009
Keywords: calculation impairment, distance effect, numerical cognition, ERP, PCA
Organisations: Psychology

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Local EPrints ID: 375345
URI: http://eprints.soton.ac.uk/id/eprint/375345
ISSN: 0885-2014
PURE UUID: 9f3d98b0-272a-41cf-9290-d8c3463b78af

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Date deposited: 31 Mar 2015 15:52
Last modified: 14 Mar 2024 19:24

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Contributors

Author: Fruzsina Soltész
Author: Dénes Szűcs

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