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Peer reviewedOlson, Richard; And Others – Journal of Learning Disabilities, 1989
Word recognition data from identical and fraternal twins and siblings (N=172) indicated that the phonological coding deficit of children with reading disabilities was highly heritable. Orthographic coding was not significantly heritable. Poor readers with low IQs were superior to similar reading but average IQ readers in phonological coding.…
Descriptors: Elementary Secondary Education, Genetics, Heredity, Intelligence Differences
