NotesFAQContact Us
Collection
Advanced
Search Tips
Showing all 5 results Save | Export
Writing and Reading Skills as Assessed by Teachers in 7-Year Olds: A Behavioral Genetic Approach
Peer reviewed Peer reviewed
Direct linkDirect link
Oliver, Bonamy R.; Dale, Philip S.; Plomin, Robert – Cognitive Development, 2007
A behavioral genetic analysis of general writing ability was conducted using teacher assessments based on UK National Curriculum criteria for a sample of 3296 same-sex pairs of 7-year-old twins. Writing was highly heritable within the normal range (0.66) and at the low extreme (0.70). Environmental influences were almost all non-shared, with…
Descriptors: Writing Ability, Reading Skills, National Curriculum, Genetics
The Genetic and Environmental Origins of Learning Abilities and Disabilities in the Early School Years
Peer reviewed Peer reviewed
Direct linkDirect link
Kovas, Yulia; Haworth, Claire M. A.; Dale, Philip S.; Plomin, Robert – Monographs of the Society for Research in Child Development, 2007
Despite the importance of learning abilities and disabilities in education and child development, little is known about their genetic and environmental origins in the early school years. We report results for English (which includes reading, writing, and speaking), mathematics, and science as well as general cognitive ability in a large and…
Descriptors: Nature Nurture Controversy, Genetics, Environmental Influences, Cognitive Ability
Common Aetiology for Diverse Language Skills in 4 1/2-Year-Old Twins
Peer reviewed Peer reviewed
Direct linkDirect link
Hayiou-Thomas, Marianna E.; Kovas, Yulia; Harlaar, Nicole; Plomin, Robert; Bishop, Dorothy V. M.; Dale, Philip S. – Journal of Child Language, 2006
Multivariate genetic analysis was used to examine the genetic and environmental aetiology of the interrelationships of diverse linguistic skills. This study used data from a large sample of 4 1/2-year-old twins who were tested on measures assessing articulation, phonology, grammar, vocabulary, and verbal memory. Phenotypic analysis suggested two…
Descriptors: Twins, Phonology, Genetics, Environmental Influences
Genetic and Environmental Covariation between Verbal and Nonverbal Cognitive Development in Infancy.
Peer reviewed Peer reviewed
Price, Thomas S.; Eley, Thalia C.; Dale, Philip S.; Stevenson, Jim; Plomin, Robert – Child Development, 2000
Examined infant verbal and nonverbal cognitive development for 1,937 pairs of same-sex 2-year-old twins. Found that verbal and nonverbal development correlated .42. Genetic factors were responsible for less than half of this phenotypic correlation. The genetic correlation between verbal and nonverbal abilities was only .30, suggesting that genetic…
Descriptors: Cognitive Development, Cognitive Processes, Infants, Nature Nurture Controversy
The Structure of Language Abilities at 4 Years: A Twin Study.
Peer reviewed Peer reviewed
Colledge, Essi; Bishop, Dorothy V.M.; Koeppen-Schomerus, Gesina; Price, Thomas S.; Happe, Francesca G.E.; Eley, Thalia C.; Dale, Philip S.; Plomin, Robert – Developmental Psychology, 2002
Language development was studied in 310 pairs of 4-year-old twins. Rotated factor analyses indicated presence of a general language factor (L) and a general nonverbal factor (NV). Moderate genetic influence was found for L and NV abilities. Bivariate genetic analysis estimated a genetic correlation of .63 between L and NV abilities. Results…
Descriptors: Cognitive Development, Factor Analysis, Individual Differences, Language Acquisition