Genetic and Environmental Influences on Word Recognition and Spelling Deficits as a Function of Age

被引：0
作者：
Angela Friend
John C. DeFries
Sally J. Wadsworth
Richard K. Olson
机构：
[1] University of Colorado at Boulder,Department of Psychology, 345 UCB
[2] University of Colorado at Boulder,Institute for Behavioral Genetics
来源：
Behavior Genetics | 2007年 / 37卷
关键词：
Reading disability; Spelling disability; Genetics; Age; Twins;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Previous twin studies have suggested a possible developmental dissociation between genetic influences on word recognition and spelling deficits, wherein genetic influence declined across age for word recognition, and increased for spelling recognition. The present study included two measures of word recognition (timed, untimed) and two measures of spelling (recognition, production) in younger and older twins. The heritability estimates for the two word recognition measures were .65 (timed) and .64 (untimed) in the younger group and .65 and .58 respectively in the older group. For spelling, the corresponding estimates were .57 (recognition) and .51 (production) in the younger group and .65 and .67 in the older group. Although these age group differences were not significant, the pattern of decline in heritability across age for reading and increase for spelling conformed to that predicted by the developmental dissociation hypothesis. However, the tests for an interaction between genetic influences on word recognition and spelling deficits as a function of age were not significant.
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页码：477 / 486
页数：9
相关论文
共 46 条
[1]  
Bakwin H(1973)Reading disability in twins Dev Med Child Neurol 15 184-187
[2]  
Byrne B(2007)Longitudinal twin study of early development: Preschool through grade 1 Reading and Writing: An Interdisciplinary Journal 20 77-102
[3]  
Samuelsson S(1985)Multiple regression analysis of twin data Behav Genet 15 467-473
[4]  
Wadsworth S(1988)Multiple regression analysis of twin data: Etiology of deviant scores versus individual differences Acta Geneticae Medicae et Gemellologiae: Twin Research 37 205-216
[5]  
Hulslander J(2001)Genetic and environmental influences on orthographic and phonological skills in children with reading disabilities Dev Neuropsychol 20 483-507
[6]  
Corley R(2003)Genetic and environmental influences on individual differences in printed word recognition J Exp Child Psychol 84 97-123
[7]  
DeFries JC(2005)Genetic influences on early word recognition abilities and disabilities: a study of 7-year-old twins J Child Psychol Psychiatry 46 373-384
[8]  
Quain P(2006)Genetic influences on reading difficulties in boys and girls: the Colorado twin study Dyslexia 12 21-29
[9]  
Willcutt EG(1997)A solution to Plato’s problem: The latent semantic analysis theory of acquisition, induction and representation of knowledge Psychol Rev 14 211-240
[10]  
Olson RK(2005)Generalist genes and learning disabilities Psychol Bull 131 592-617
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