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

作者：Soltesz Fruzsina^*; Szucs Denes

来源：Cognitive Development, 2009, 24(4): 473-485.

DOI：10.1016/j.cogdev.2009.09.002

• Calculation impairment
• Distance effect
• Numerical cognition
• ERP
• PCA

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 (Soltesz 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 market 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.

• 出版日期2009-12