Finds no evidence to counter the assumption that reading begins with a logographic stage; teaching method had a significant impact on children's reading strategies; and several children taught using the whole word technique appeared to exhibit letter-by-letter reading. Suggests that letter-by-letter dyslexia might be an extreme form of a strategy…

Investigates genetic influences on reading in a sample of 285, 13-year-old twins. Finds the heritability of disability for reading recognition to be nonsignificant but that spelling had a substantial genetic contribution to all levels of disability. Suggests two possible independent aspects of phonological ability, each influenced by genetic…

Examines consequences of using alternative definitions for prevalence, sex ratio and heritability. Demonstrates that the characteristics of reading-disabled children vary with the way disability is defined. Concludes that the use of regression-based procedures for identifying reading disability is desirable. Suggests insufficient evidence exists…