A comparative analysis of cognitive profiles: Monozygotic and dizygotic reading-disabled twins
✍ Scribed by Hsiu-Zu Ho; Sadie N. Decker
- Publisher
- Springer Netherlands
- Year
- 1989
- Tongue
- English
- Weight
- 759 KB
- Volume
- 1
- Category
- Article
- ISSN
- 0922-4777
No coin nor oath required. For personal study only.
✦ Synopsis
AEKTRACT: Previous twin studies have provided evidence for genetic intluences on reading disability (RD) or "normal" reading ability. The existence of subtypes of RDeach with its characteristic cognitive profile -has been suggested. Whether the etiology of the particular subtypes is genetic is uncertain. The present study examined within-pair comparisons of cognitive profiles (with respect to composites of general reading, symbol processing speed and sequential memory) in RD and control twins. Twin profile analysis were applied to these cognitive composites on 120 pairs of RD and control twins. Results showed a greater monozygotic (MZ) than dizygotic (DZ) resemblance in profiles indicating that individual differences in the patterning of cognitive abilities related to reading are genetically influenced.