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Direct linkPetrill, Stephen A.; Deater-Deckard, Kirby; Schatschneider, Christopher; Davis, Chayna – Infant and Child Development, 2007
Evidence from intervention studies, quantitative genetic and molecular genetic studies suggests that genetic, and to a lesser extent, shared environmental influences are important to the development of reading and related cognitive skills. The Northeast-Northwest Collaborative Adoption Projects (N2CAP) is a sample of 241 adoptive families,…
Descriptors: Evidence, Genetics, Parents, Family Environment
Glover, Marshaun B.; Mullineaux, Paula Y.; Deater-Deckard, Kirby; Petrill, Stephen A. – Infant and Child Development, 2010
In the current study, we examined parent gender differences in feelings (negativity and positivity) and perceptions of child behavioural and emotional problems in adoptive and biological parent-child dyads. In a sample of 85 families, we used a novel within-family adoption design in which one child was adopted and one child was a biological child…
Descriptors: Emotional Problems, Mothers, Parent Child Relationship, Adjustment (to Environment)
Deater-Deckard, Kirby; Petrill, Stephen A. – Journal of Child Psychology and Psychiatry, 2004
Background: Parent-child mutuality is comprised of emotional reciprocity, co-responsiveness, and cooperation, which together represent aspects of co-regulation of emotion and behavior that may be important in the etiology of children's behavior problems. Furthermore, individual differences in children's mutuality and behavior problems involve…
Descriptors: Behavior Problems, Siblings, Mothers, Cooperation
Petrill, Stephen A.; Deater-Deckard, Kirby; Thompson, Lee Anne; DeThorne, Laura S.; Schatschneider, Christopher – Journal of Learning Disabilities, 2006
The present study combined parallel data from the Northeast-Northwest Collaborative Adoption Projects (N2CAP) and the Western Reserve Reading Project (WRRP) to examine sibling similarity and quantitative genetic model estimates for measures of reading skills in 272 school-age sibling pairs from three family types (monozygotic twins, dizygotic…
Descriptors: Environmental Influences, Cognitive Ability, Twins, Reading Skills
Petrill, Stephen A.; Deater-Deckard, Kirby – Intelligence, 2004
The current study employed a within-family adoption design to examine the genetic and environmental influences on general cognitive ability. A sample of 51 families with biological (mean age = 9.83 years, S.D. = 2.81) and adoptive children (mean age = 6.86, S.D. = 1.92) was selected from the larger "Northeast-Northwest Collaborative Adoption…
Descriptors: Cognitive Ability, Family (Sociological Unit), Heredity, Environmental Influences
