NotesFAQContact Us
Collection
Advanced
Search Tips
Showing all 7 results Save | Export
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
Peer reviewed Peer reviewed
Direct linkDirect link
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
Peer reviewed Peer reviewed
Plomin, Robert; And Others – Journal of Marriage and the Family, 1989
Studied genetic and environmental origins of individual differences in adults' (N=386) ratings of their current family environment using Moos Family Environment Scales (FES). Found 25 percent of adults' FES scores due to genetic differences. Found environment in which they were reared had little effect on adults' ratings of their family…
Descriptors: Affective Measures, Biological Influences, Environmental Influences, Family Environment
Peer reviewed Peer reviewed
Direct linkDirect link
Walker, Sheila O.; Petrill, Stephen A.; Plomin, Robert – Educational Psychology, 2005
Although it is well established that school characteristics (SCH) and socio-economic status (SES) are associated with academic achievement (ACH), these correlations are not necessarily causal. Because academic achievement shows substantial genetic influence, it is useful to embed such investigations in genetically sensitive designs in order to…
Descriptors: Educational Environment, Siblings, Socioeconomic Status, Genetics
Peer reviewed Peer reviewed
Saudino, Kimberly J.; Plomin, Robert – Merrill-Palmer Quarterly, 1997
Conducted a trivariate genetic analysis of the Home Observation for Measurement of the Environment (HOME), Mental Development Index (MDI), and Task Orientation (TO). Found that for 101 nonadoptive and 92 adoptive sibling pairs at 12 and 24 months of age, TO explained the remaining genetic variance on the HOME not explained by the MDI. (MDM)
Descriptors: Adopted Children, Biological Influences, Cognitive Development, Family Environment
Peer reviewed Peer reviewed
Eley, Thalia C.; Dale, Philip; Bishop, Dorothy; Price, Thomas S.; Plomin, Robert – Journal of Educational Psychology, 2001
Etiology of verbal and performance delays were investigated in a large population sample of twins at 2 and 3 years (N=2,449 pair). Longitudinal genetic analyses indicated substantial heritability of verbal delay from 2 to 3 years, especially in combination with performance delay. Results suggest a strong genetic contribution to verbal delay…
Descriptors: Biological Influences, Cognitive Ability, Cognitive Development, Developmental Delays
Plomin, Robert; And Others – Advances in Applied Developmental Psychology, 1996
This chapter argues for the value of sibling research in addressing behavioral genetic issues on the etiology of individual differences. The goal of the report is to provide a set of simple and practical examples of sibling analyses in order to highlight the importance of incorporating siblings in future research. It begins with a discussion of…
Descriptors: Adult Development, Causal Models, Context Effect, Etiology