Overlapping numerical cognition impairments in children with chromosome 22q11.2 deletion or Turner syndromes.

Overlapping numerical cognition impairments in children with chromosome 22q11.2 deletion or Turner syndromes. Research Abstract Details 

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Overlapping numerical cognition impairments in children with chromosome 22q11.2 deletion or Turner syndromes. Abstract Text:

T J Simon,Y Takarae,T Deboer,D M McDonald-McGinn,E H Zackai,J L Ross,

Children with one of two genetic disorders (chromosome 22q11.2 deletion syndrome and Turner syndrome) as well typically developing controls, participated in three cognitive processing experiments. Two experiments were designed to test cognitive processes involved in basic aspects numerical cognition. The third was a test of simple manual motor reaction time. Despite significant differences in global intellectual abilities, as measured by IQ tests, performance on the two numerical cognition tasks differed little between the two groups of children with genetic disorders. However, both performed significantly more poorly than did controls. The pattern of results are consistent with the hypothesis that impairments were not due to global intellectual ability but arose in specific cognitive functions required by different conditions within the tasks. The fact that no group differences were found in the reaction time task, despite significant differences in the standardized processing speed measure, further supports the interpretation that specific cognitive processing impairments and not global intellectual or processing speed impairments explain the pattern of results. The similarity in performance on these tasks of children with unrelated genetic disorders counters the view that numerical cognition is under any direct genetic control. Instead, our findings are consistent with the view that disturbances in foundational spatiotemporal cognitive functions contribute to the development of atypical representations and processes in the domains of basic magnitude comparison and simple numerical enumeration.

Overlapping numerical cognition impairments in children with chromosome 22q11.2 deletion or Turner syndromes. Publishing Authors By Initials

TJ Simon,Y Takarae,T Deboer,DM McDonald-McGinn,EH Zackai,JL Ross,

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Overlapping numerical cognition impairments in children with chromosome 22q11.2 deletion or Turner syndromes. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Neuropsychologia

VOLUME: 46

Page Numbers: 82-94

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ISSN: 0028-3932

DAY: 26

MONTH: 08

YEAR: 2007

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LANGUAGE: eng

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AFFILIATION: M.I.N.D. Institute, University of California at Davis, 2825 50th Street, Sacramento, CA 95817, United States.

Country: England

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MEDLINETA: Neuropsychologia

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