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Turkheimer, Eric; D'Onofrio, Brian M.; Maes, Hermine H.; Eaves, Lindon J. – Child Development, 2005
Recent reports using a classical behavior genetic research design in which twin data are combined with a measured characteristic of their shared family environment have made striking claims about estimating environmental influences on behavior with genetic effects controlled. Such claims are overstated for two related reasons. First, when a…
Descriptors: Twins, Environmental Influences, Family Environment, Genetics

Wilson, Ronald S.; And Others – Child Development, 1971
Mothers of 232 pairs of twins were interviewed periodically about the similarities and differences in behavior displayed by their twins during infancy and early childhood. (Authors)
Descriptors: Attention Span, Behavior Patterns, Behavioral Science Research, Data Analysis