Number-processing skills in adults with dyslexia.

The present study investigated basic numerical skills and arithmetic in adults with developmental dyslexia. Participants performed exact and approximate calculation, basic numerical tasks (e.g., counting; symbolic number comparison; spatial-numerical association of response codes, SNARC), and visuos...

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Main Authors: Gobel, S, Snowling, M
Format: Journal article
Language:English
Published: 2010
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author Gobel, S
Snowling, M
author_facet Gobel, S
Snowling, M
author_sort Gobel, S
collection OXFORD
description The present study investigated basic numerical skills and arithmetic in adults with developmental dyslexia. Participants performed exact and approximate calculation, basic numerical tasks (e.g., counting; symbolic number comparison; spatial-numerical association of response codes, SNARC), and visuospatial tasks (mental rotation and visual search tasks). The group with dyslexia showed a marginal impairment in counting compared to age- and IQ-matched controls, and they were impaired in exact addition, in particular with respect to speed. They were also significantly slower in multiplication. In basic number processing, however, there was no significant difference in performance between those with dyslexia and controls. Both groups performed similarly on subtraction and approximate addition tasks. These findings indicate that basic number processing in adults with dyslexia is intact. Their difficulties are restricted to the verbal code and are not associated with deficits in nonverbal magnitude representation, visual Arabic number form, or spatial cognition.
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spelling oxford-uuid:b6bee985-c7ec-4eed-9f30-86ccadee419c2022-03-27T04:43:14ZNumber-processing skills in adults with dyslexia.Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:b6bee985-c7ec-4eed-9f30-86ccadee419cEnglishSymplectic Elements at Oxford2010Gobel, SSnowling, MThe present study investigated basic numerical skills and arithmetic in adults with developmental dyslexia. Participants performed exact and approximate calculation, basic numerical tasks (e.g., counting; symbolic number comparison; spatial-numerical association of response codes, SNARC), and visuospatial tasks (mental rotation and visual search tasks). The group with dyslexia showed a marginal impairment in counting compared to age- and IQ-matched controls, and they were impaired in exact addition, in particular with respect to speed. They were also significantly slower in multiplication. In basic number processing, however, there was no significant difference in performance between those with dyslexia and controls. Both groups performed similarly on subtraction and approximate addition tasks. These findings indicate that basic number processing in adults with dyslexia is intact. Their difficulties are restricted to the verbal code and are not associated with deficits in nonverbal magnitude representation, visual Arabic number form, or spatial cognition.
spellingShingle Gobel, S
Snowling, M
Number-processing skills in adults with dyslexia.
title Number-processing skills in adults with dyslexia.
title_full Number-processing skills in adults with dyslexia.
title_fullStr Number-processing skills in adults with dyslexia.
title_full_unstemmed Number-processing skills in adults with dyslexia.
title_short Number-processing skills in adults with dyslexia.
title_sort number processing skills in adults with dyslexia
work_keys_str_mv AT gobels numberprocessingskillsinadultswithdyslexia
AT snowlingm numberprocessingskillsinadultswithdyslexia