An electrophysiological investigation of non-symbolic magnitude processing. Numerical distance effects in children with and without mathematical learning disabilities.

Autor/inn/en	Heine, Angela; Wißmann, Jacqueline; Tamm, Sascha; De Smedt, Bert; Schneider, Michael; Stern, Elsbeth; Verschaffel, Lieven; Jacobs, Arthur M.
Titel	An electrophysiological investigation of non-symbolic magnitude processing. Numerical distance effects in children with and without mathematical learning disabilities.
Quelle	In: Cortex, 49 (2013) 8, S. 2162-2177 PDF als Volltext Link als defekt meldenVerfügbarkeit
Beigaben	Literaturangaben
Zusatzinformation	Forschungsdaten, Studiendetails und Erhebungsinstrumente
Sprache	englisch
Dokumenttyp	online; gedruckt; Zeitschriftenaufsatz
ISSN	0010-9452; 1973-8102
DOI	10.1016/j.cortex.2012.11.009
Schlagwörter	Test; Grundschule; Schüler; Lernbehinderung; Lernschwäche; Größenvorstellung; Mathematikunterricht; Numerische Mathematik; Rechenschwäche; Zahlenverständnis
Abstract	Introduction: The aim of the present study was to probe electrophysiological effects of non-symbolic numerical processing in 20 children with mathematical learning disabilities(mean age¼99.2 months) compared to a group of 20 typically developing matched controls(mean age¼98.4 months). Methods: EEG data were obtained while children were tested with a standard non-symbolic numerical comparison paradigm that allowed us to investigate the effects of numerical distance manipulations for different set sizes, i.e., the classical subitizing, counting and estimation ranges. Effects of numerical distance manipulations on event-related potential (ERP) amplitudes as well as activation patterns of underlying current sources were analyzed. Results: In typically developing children, the amplitudes of a late parietal positive-going ERPcomponent showed systematic numerical distance effects that did not depend on set size. For the group of children with mathematical learning disabilities, ERP distance effects were found only for stimuli within the subitizing range. Current source density analysis of distance-related group effects suggested that areas in right inferior parietal regions are involved in the generation of the parietal ERP amplitude differences. Conclusion: Our results suggest that right inferior parietal regions are recruited differentially by controls compared to children with mathematical learning disabilities in response to non-symbolic numerical magnitude processing tasks, but only for stimuli with set sizes that exceed the subitizing range. (Orig.).
Erfasst von	DIPF \| Leibniz-Institut für Bildungsforschung und Bildungsinformation, Frankfurt am Main
Update	2020/3