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Eaves, Lindon J.; Silberg, Judy L. – Journal of Child Psychology and Psychiatry, 2008
Background: If the adaptive significance of specific fears changes with age, the genetic contribution to individual differences may be lowest at the age of greatest salience. The roles of genes and environment in the developmental-genetic trajectory of five common childhood fears are explored in 1094 like-sex pairs of male and female monozygotic…
Descriptors: Twins, Markov Processes, Adolescents, Genetics
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Foley, Debra L.; Pickles, Andrew; Rutter, Michael; Gardner, Charles O.; Maes, Hermine H.; Silberg, Judy L.; Eaves, Lindon J. – Journal of Child Psychology and Psychiatry, 2004
Background: It is not known if the prevalence of parental psychiatric disorders is higher in stepfather than intact families, or if parental alcoholism is differentially associated with risk for conduct disorder (CD) symptoms in stepfather families versus intact families. Method: The sample comprised 839 girls and 741 boys from 792 intact families…
Descriptors: Anxiety Disorders, Personality Problems, Family (Sociological Unit), Incidence