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Types of Dyslexia and the Shift to Dextrality
Author(s) -
Annett Marian,
Eglinton Elizabeth,
Smythe Pamela
Publication year - 1996
Publication title -
journal of child psychology and psychiatry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.652
H-Index - 211
eISSN - 1469-7610
pISSN - 0021-9630
DOI - 10.1111/j.1469-7610.1996.tb01388.x
Subject(s) - dyslexia , psychology , phonology , developmental psychology , biological theories of dyslexia , preference , communication disorder , developmental dyslexia , language disorder , reading (process) , cognition , linguistics , neuroscience , philosophy , microeconomics , economics
The prediction of the right shift theory that there are two types of dyslexia with different distributions of handedness was examined in a large cohort of school children. Dyslexics with poor phonology were less biased to dextrality than controls, while dyslexics without poor phonology tended to be more dextral than controls on measures of hand preference and hand skill. Relatives also differed for handedness, as expected if phonological dyslexics were less likely than nonphonological dyslexics and controls to carry the hypothesized rs + gene.