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Different letter-processing strategies in diagnostic subgroups of developmental dyslexia.
- Source :
-
Cognitive Neuropsychology . Jul2008, Vol. 25 Issue 5, p730-744. 15p. 2 Diagrams, 3 Charts, 2 Graphs. - Publication Year :
- 2008
-
Abstract
- Normally reading adults (N = 15) and primary school children (N = 24) and two diagnostic subgroups of children with developmental dyslexia (N = 21)—all native German speakers—performed a successive same-different task with pairs of letters and nonletters (pseudoletters or geometrical shapes). The first item of a pair was always presented on its own, and the second either on its own or surrounded by a congruent or incongruent nontarget shape. Adults showed congruence effects with nonletters but not with letters, and children with both types of stimuli. Frequent-word reading-impaired dyslexics (N = 11) in addition showed dramatically slower overall reaction times. Nonword reading-impaired dyslexics (N = 10) showed congruence effects with nonletters but negative congruence effects with letters. The results support the notion that normal readers have established a special visual processing strategy for letters. Processing speed rather than reading expertise seems crucial for this strategy to emerge. The contrasting effects between subgroups of dyslexics reveal specific underlying deficits. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 02643294
- Volume :
- 25
- Issue :
- 5
- Database :
- Academic Search Index
- Journal :
- Cognitive Neuropsychology
- Publication Type :
- Academic Journal
- Accession number :
- 33945506
- Full Text :
- https://doi.org/10.1080/02643290802309514