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Lubke, Gitta H.; McArtor, Daniel B.; Boomsma, Dorret I.; Bartels, Meike – Developmental Psychology, 2018
Longitudinal data from a large sample of twins participating in the Netherlands Twin Register (n = 42,827, age range 3-16) were analyzed to investigate the genetic and environmental contributions to childhood aggression. Genetic auto-regressive (simplex) models were used to assess whether the same genes are involved or whether new genes come into…
Descriptors: Foreign Countries, Longitudinal Studies, Twins, Aggression
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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
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Anderson, Lowell T.; Ernst, Monique – Journal of Autism and Developmental Disorders, 1994
Questionnaires completed by parents of 40 patients with Lesch-Nyhan disease provide information on developmental history, life course, management, medication, variability, and topography of self-injury. Analysis indicated that patients could not inhibit self-injury but could predict it and request restraints; self-injury was strongly related to…
Descriptors: Aggression, Behavior Disorders, Behavior Modification, Congenital Impairments