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A TWIN STUDY OF BANNATYNE'S “GENETIC DYSLEXIC” SUBTYPE
Author(s) -
Ho HsiuZu,
Gilger Jeffrey W.,
Decker Sadie N.
Publication year - 1988
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.1469-7610.1988.tb00689.x
Subject(s) - dyslexia , psychology , dizygotic twins , reading disability , twin study , monozygotic twin , developmental psychology , reading (process) , developmental dyslexia , etiology , dizygotic twin , genetics , language disorder , cognition , psychiatry , biology , medicine , heritability , linguistics , philosophy , obstetrics
Bannatyne's proposed “genetic dyslexic” subtype of reading disability (RD) was evaluated using data obtained from 60 (30 monozygotic and 30 dizygotic) pairs of affected twins (in which at least one member of each pair has a reading disorder) and 60 pairs of control twins. The predicted spatial > conceptual > sequential pattern of means was found to be reliable and specific to the RD sample. While this study does not provide conclusive evidence on the genetic etiology of the proposed subtype, our results do indicate that individuals with this particular profile may constitute a specific subtype of reading disability.