Poster (Scientific congresses and symposiums)
Evidence for a global access deficit to the meaning of numerical symbols in people with Williams syndrome.
Rousselle, Laurence; Noel, Marie-Pascale
2014Sixth Expert Meeting on Mathematical Thinking and Learning
 

Files


Full Text
2014-Leiden & Göttingen.pdf
Publisher postprint (206.73 kB)
Download

All documents in ORBi are protected by a user license.

Send to



Details



Abstract :
[en] Recent studies suggest that patients with Williams syndrome (WS) present specific deficit in processing numerical magnitude (Krajcsi et al., 2009; O’Hearn & Landau, 2007; Paterson et al., 2006). Contradictory evidence has nevertheless been reported about a possible impairment of their subitizing abilities (Ansari et al., 2007; O’Hearn et al., 2005, 2011). As patients with WS were always tested in the visual modality, it remains unclear whether their deficit is specific to the processing of numerical magnitude or result from their basic visuo-spatial impairment (main characteristic of the WS cognitive phenotype). A first set of results supported the second hypothesis as people with WS were shown to have lower numerical acuity only in numerical tasks with high visuo-spatial processing requirements (i.e. comparing two lengths or two arrays of elements but not when comparing two durations or two sequences of flash in a single location; Rousselle & Noël, 2013). Recently, we tested whether a similar dissociation would be observed in processing the meaning of numerical symbols. Patients with WS were asked to compare the numerical magnitude of two Arabic numbers vs two spoken verbal numerals. They also had to enumerate sets of 1 to 7 dots shown for 250 ms to explore their subitizing abilities. Participants with WS were compared to two groups of children, one matched on verbal and the other matched on nonverbal mental abilities. Our results indicate that people with WS have difficulties in accessing the meaning of numerical symbols whatever the format and present smaller subitizing range.
Disciplines :
Theoretical & cognitive psychology
Neurosciences & behavior
Author, co-author :
Rousselle, Laurence  ;  Université de Liège > Département de Psychologie > Psychologie du développement cognitif normal et atypique
Noel, Marie-Pascale
Language :
English
Title :
Evidence for a global access deficit to the meaning of numerical symbols in people with Williams syndrome.
Publication date :
04 April 2014
Event name :
Sixth Expert Meeting on Mathematical Thinking and Learning
Event place :
Leiden, Netherlands
Event date :
4 avril 2014
Audience :
International
Available on ORBi :
since 01 February 2016

Statistics


Number of views
76 (3 by ULiège)
Number of downloads
36 (2 by ULiège)

Bibliography


Similar publications



Contact ORBi