Processing ordinality and quantity: the case of developmental dyscalculia.

In contrast to quantity processing, up to date, the nature of ordinality has received little attention from researchers despite the fact that both quantity and ordinality are embodied in numerical information. Here we ask if there are two separate core systems that lie at the foundations of numerica...

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Autores principales:	Orly Rubinsten, Dana Sury
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2011
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/e49b1cb0d4a0482ab297c228991b17e3
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spelling	oai:doaj.org-article:e49b1cb0d4a0482ab297c228991b17e32021-11-04T06:08:34ZProcessing ordinality and quantity: the case of developmental dyscalculia.1932-620310.1371/journal.pone.0024079https://doaj.org/article/e49b1cb0d4a0482ab297c228991b17e32011-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/21935374/pdf/?tool=EBIhttps://doaj.org/toc/1932-6203In contrast to quantity processing, up to date, the nature of ordinality has received little attention from researchers despite the fact that both quantity and ordinality are embodied in numerical information. Here we ask if there are two separate core systems that lie at the foundations of numerical cognition: (1) the traditionally and well accepted numerical magnitude system but also (2) core system for representing ordinal information. We report two novel experiments of ordinal processing that explored the relation between ordinal and numerical information processing in typically developing adults and adults with developmental dyscalculia (DD). Participants made "ordered" or "non-ordered" judgments about 3 groups of dots (non-symbolic numerical stimuli; in Experiment 1) and 3 numbers (symbolic task: Experiment 2). In contrast to previous findings and arguments about quantity deficit in DD participants, when quantity and ordinality are dissociated (as in the current tasks), DD participants exhibited a normal ratio effect in the non-symbolic ordinal task. They did not show, however, the ordinality effect. Ordinality effect in DD appeared only when area and density were randomized, but only in the descending direction. In the symbolic task, the ordinality effect was modulated by ratio and direction in both groups. These findings suggest that there might be two separate cognitive representations of ordinal and quantity information and that linguistic knowledge may facilitate estimation of ordinal information.Orly RubinstenDana SuryPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 6, Iss 9, p e24079 (2011)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Orly Rubinsten Dana Sury Processing ordinality and quantity: the case of developmental dyscalculia.
description	In contrast to quantity processing, up to date, the nature of ordinality has received little attention from researchers despite the fact that both quantity and ordinality are embodied in numerical information. Here we ask if there are two separate core systems that lie at the foundations of numerical cognition: (1) the traditionally and well accepted numerical magnitude system but also (2) core system for representing ordinal information. We report two novel experiments of ordinal processing that explored the relation between ordinal and numerical information processing in typically developing adults and adults with developmental dyscalculia (DD). Participants made "ordered" or "non-ordered" judgments about 3 groups of dots (non-symbolic numerical stimuli; in Experiment 1) and 3 numbers (symbolic task: Experiment 2). In contrast to previous findings and arguments about quantity deficit in DD participants, when quantity and ordinality are dissociated (as in the current tasks), DD participants exhibited a normal ratio effect in the non-symbolic ordinal task. They did not show, however, the ordinality effect. Ordinality effect in DD appeared only when area and density were randomized, but only in the descending direction. In the symbolic task, the ordinality effect was modulated by ratio and direction in both groups. These findings suggest that there might be two separate cognitive representations of ordinal and quantity information and that linguistic knowledge may facilitate estimation of ordinal information.
format	article
author	Orly Rubinsten Dana Sury
author_facet	Orly Rubinsten Dana Sury
author_sort	Orly Rubinsten
title	Processing ordinality and quantity: the case of developmental dyscalculia.
title_short	Processing ordinality and quantity: the case of developmental dyscalculia.
title_full	Processing ordinality and quantity: the case of developmental dyscalculia.
title_fullStr	Processing ordinality and quantity: the case of developmental dyscalculia.
title_full_unstemmed	Processing ordinality and quantity: the case of developmental dyscalculia.
title_sort	processing ordinality and quantity: the case of developmental dyscalculia.
publisher	Public Library of Science (PLoS)
publishDate	2011
url	https://doaj.org/article/e49b1cb0d4a0482ab297c228991b17e3
work_keys_str_mv	AT orlyrubinsten processingordinalityandquantitythecaseofdevelopmentaldyscalculia AT danasury processingordinalityandquantitythecaseofdevelopmentaldyscalculia
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Processing ordinality and quantity: the case of developmental dyscalculia.

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