Familial patterns of learning disabilities |
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Authors: | Sandra Smith |
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Institution: | (1) Sequim School District, Sequim, Washington |
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Abstract: | Extended families of 12 young adults (9 LD, 3 non-LD) were given a battery of tests and questionnaires, and 131 persons, ranging
in age from 6 to 85, were classified as LD or non-LD on the basis of subtest scores 1 SD below the mean or less on subtests
of the PIAT and WRAT achievement tests. Pedigree analysis indicated that LD was strongly familial, with the most probable
mode involving a major gene effect, but the type of disability (reading/ math) was not directly inherited. Autoimmune disorders
were significantly correlated (P<.005) with LD, especially in families in which LD remained a major handicap into adulthood,
a trait that also varied between families. In two of the LD families, adults showed little evidence of the reading/spelling
deficits they had shown when tested as children, while adults in other families failed to make gains in reading and spelling. |
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Keywords: | |
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