Article
Genetic and environmental origins of verbal and performance components of cognitive delay in 2-year-olds.
Developmental psychology - 1 Jul 1999
Eley T C, Bishop D V, Dale P S, Oliver B, Petrill S A, Price T S, Purcell S, Saudino K J, Simonoff E, Stevenson J, Plomin R
Abstract excerpt
The authors investigated the etiology of several measures of cognitive delay. Verbal (V) and performance (P) abilities were assessed in over 3,000 pairs of 2-year-old twins. Group-differences heritability for general delay (the lowest 5% of the V and P composite) was 35%. However, V and P delays considered independently showed large differences in group heritability (77% for V vs. 40% for P). Specific delays with...
Read the complete abstract on PubMedTopics
Share this publication in a Topic to start or enrich a Post.