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Direct linkChow, Bonnie Wing-Yin; Ho, Connie Suk-Han; Wong, Simpson Wai-Lap; Waye, Mary M. Y.; Bishop, Dorothy V. M. – Developmental Science, 2013
This study considered how far nonverbal cognitive, language and reading abilities are affected by common genetic influences in a sample of 312 typically developing Chinese twin pairs aged from 3 to 11 years. Children were individually given tasks of Chinese word reading, receptive vocabulary, phonological memory, tone awareness, syllable and rhyme…
Descriptors: Genetics, Twins, Foreign Countries, Cognitive Ability
Davis, Oliver S. P.; Arden, Rosalind; Plomin, Robert – Intelligence, 2008
A 2003 paper in this journal reported results from a large sample of twins assessed at 2, 3 and 4 years of age on parent-administered tests and reports of their verbal and nonverbal ability. We found clear evidence for phenotypic general cognitive ability (g) that accounted for about 50% of the variance, for modest genetic influence on g (about…
Descriptors: Twins, Toddlers, Children, Measurement Techniques
Fontaine, Nathalie; Barker, Edward D.; Salekin, Randall T.; Viding, Essi – Journal of Clinical Child and Adolescent Psychology, 2008
Individuals with psychopathic traits are hypothesized to be free of intellectual deficits and possibly even to exhibit good cognitive abilities. Previous studies, based on clinical and incarcerated youth, have shown inconsistent findings. We investigated the relationships between different dimensions of psychopathy (callous/unemotional traits,…
Descriptors: Conceptual Tempo, Hyperactivity, Psychopathology, Nonverbal Ability
Hoekstra, Rosa A.; Bartels, Meike; Boomsma, Dorret I. – Learning and Individual Differences, 2007
In a longitudinal genetic study we explored which factors underlie stability in verbal and nonverbal abilities, and the extent to which the association between these abilities becomes stronger as children grow older. Measures of verbal and nonverbal IQ were collected in Dutch twin pairs at age 5, 7, 10, 12 and 18 years. The stability of both…
Descriptors: Twins, Intervals, Structural Equation Models, Intelligence Quotient
Asbury, Kathryn; Wachs, Theodore D.; Plomin, Robert – Intelligence, 2005
The study of genotype-environment interaction (G x E) has been dominated by two competing hypotheses, one that heritability is greater in high-risk environments (diathesis-stress) and the other that heritability is greater in permissive environments. The current study examined relationships between verbal and nonverbal abilities and 10 measured…
Descriptors: Nonverbal Ability, Young Children, Verbal Ability, Genetics
Genetic and Environmental Covariation between Verbal and Nonverbal Cognitive Development in Infancy.
Peer reviewedPrice, 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
Spinath, Frank M.; Harlaar, Nicole; Ronald, Angelica; Plomin, Robert – American Journal on Mental Retardation, 2004
We report the first major genetic study of mild mental impairment. From a representative sample of 3,886 twins (1,314 monozygotic, 1,296 dizygotic same-sex, and 1,276 dizygotic opposite-sex), the lowest 5% were selected on a composite measure of verbal and nonverbal abilities assessed by parents when the twins were 2, 3, and 4 years of age. Twin…
Descriptors: Genetics, Minimal Brain Dysfunction, Young Children, Twins
Peer reviewedColledge, 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
Harlaar, Nicole; Butcher, Lee M.; Meaburn, Emma; Sham, Pak; Craig, Ian W.; Plomin, Robert – Journal of Child Psychology and Psychiatry, 2005
Background: Five DNA markers (single-nucleotide polymorphisms, SNPs) have recently been found to be associated with general cognitive ability "g") in a sample of 7414 7-year-old twins. These children have also been studied at 2, 3, 4, and 7 years of age on measures of cognitive and language development and behaviour problems; family environment…
Descriptors: Discipline, Effect Size, Family Environment, Nonverbal Ability
