Gender differences in cognitive abilities of opposite-sex and same-sex twin pairs with reading disabilty |
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| Authors: | Valerie S Knopik John C DeFries Maricela Alarcón |
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| Institution: | (1) Institute for Behavioral Genetics, University of Colorado, Campus Box 447, 80309 Boulder, CO |
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| Abstract: | In order to compare the pattern of gender differences for cognitive measures in opposite-sex twin pairs to that in independent
samples of twins from same-sex pairs, psychometric test data were obtained from four research-identified samples of children:
(1) 96 pairs of opposite-sex fraternal twins in which at least one member of each pair is reading disabled; (2) 62 pairs of
opposite-sex fraternal twins with no history of reading problems; (3) 167 males and 155 females from same-sex identical and
same-sex fraternal twin pairs in which at least one member of each pair is reading disabled; and (4) a comparison sample of
126 males and 132 females from same-sex twin pairs with no history of reading problems. Results of multivariate analyses indicate
that gender differences for cognitive measures are similar in twin pairs with and without reading disabilities. Moreover,
a highly similar pattern of gender differences occurs for opposite-sex twin pairs who shared both prenatal and early postnatal
influences and for independent samples of children from different families. |
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