NotesFAQContact Us
Collection
Advanced
Search Tips
Showing all 7 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
Bobo Clown Aggression in Childhood: Environment, Not Genes.
Peer reviewed Peer reviewed
Plomin, Robert; And Others – Journal of Research in Personality, 1981
Twin children were videotaped hitting an inflated clown figure. Three behaviors (number of hits, intensity of hits, and number of quadrants hit) showed adequate response characteristics, rater reliability, and test-retest reliability. Twin analyses of the three behavioral ratings yielded no evidence of hereditary influence. (Author)
Descriptors: Aggression, Behavior Patterns, Children, Family Influence
The Colorado Adoption Project.
Peer reviewed Peer reviewed
Plomin, Robert; DeFries, J. C. – Child Development, 1983
Provides an overview of a longitudinal, prospective, multivariate adoption study of behavioral development and discusses the results of analyses of cognitive measures and environmental assessments as examples of the types of information that can emerge from a design of this sort. (Author/RH)
Descriptors: Adoption, Behavior Development, Biological Influences, Children
An Adoption Study of the Etiology of Teacher and Parent Reports of Externalizing Behavior Problems in Middle Childhood.
Peer reviewed Peer reviewed
Deater-Deckard, Kirby; Plomin, Robert – Child Development, 1999
Explored aggression and delinquency in unrelated adoptive sibling pairs and biologically-related sibling pairs in the Colorado Adoption Project at 7, 9, 10, 11, and 12 years. Found that boys and adopted children were higher in externalizing behavior problems than girls and biologically related pairs. Sex differences in delinquency were more…
Descriptors: Adopted Children, Behavior Problems, Children, Delinquency
Nature and Nurture: Genetic Contributions to Measures of the Family Environment.
Peer reviewed Peer reviewed
Plomin, Robert; And Others – Developmental Psychology, 1994
This study of 707 sibling pairs, 10- to 18-years-old, examined parent-child and sibling interactions to determine the effects of genetics on family environment. The sample included identical and fraternal twins and full siblings in nondivorced families, as well as full, half, and unrelated siblings in divorced families. Found significant genetic…
Descriptors: Adolescents, Children, Family Environment, Family Relationship
Environment and Genes: Determinants of Behavior.
Peer reviewed Peer reviewed
Plomin, Robert – American Psychologist, 1989
Reviews research on the heritability of intellectual factors, personality factors, and psychopathology. Discusses the importance of investigating within-family environmental differences in order to understand the environmental origins of individual differences in development. (Author/BJV)
Descriptors: Behavior Development, Behavior Disorders, Child Development, Child Psychology
Are Associations between Parental Divorce and Children's Adjustment Genetically Mediated? An Adoption Study.
Peer reviewed Peer reviewed
O'Connor, Thomas G.; Caspi, Avshalom; DeFries, John C.; Plomin, Robert – Developmental Psychology, 2000
Data from Colorado Adoption Project were used to examine hypothesis that association between parental divorce and children's adjustment is mediated by genetic factors. Findings for psychopathology were consistent with an environmentally mediated explanation for the association. Findings for achievement and social adjustment were consistent with a…
Descriptors: Academic Achievement, Adopted Children, Behavior Problems, Children