Genetic and environmental etiologies of reading disability: A twin study |
| |
| Authors: | Michele C LaBuda J C DeFries |
| |
| Institution: | (1) Institute for Behavioral Genetics, University of Colorado, Campus Box 447, 80309 Boulder, CO |
| |
| Abstract: | Previous twin studies of reading disability employed a comparison of concordance rates in identical and fraternal twin pairs
as a test for genetic etiology. Recently, a statistically more powerful multiple regression analysis of twin data has been
formulated to assess the importance of genetic factors in the development of reading difficulties. Application of this analysis
to twin data from the Colorado Reading Project yields definitive evidence for a genetic etiology. Results from this study
suggest that approximately 40 percent of the deficit observed in the disabled readers is due to genetic factors, 35 percent
is due to environmental influences shared by members of twin pairs, and about 25 percent is the result of environmental factors
unique to the individual and/or error variance.
This work was supported in part by a program project grant from the NICHD (HD-11681). |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
