A Twin Study of Differentiation of Cognitive Abilities in Childhood

@article{Rietveld2003ATS,
  title={A Twin Study of Differentiation of Cognitive Abilities in Childhood},
  author={M. Rietveld and C. Dolan and G. van Baal and D. Boomsma},
  journal={Behavior Genetics},
  year={2003},
  volume={33},
  pages={367-381}
}
The differentiation hypothesis in cognitive development states that cognitive abilities become progressively more independent as children grow older. Studies of phenotypic development in children have generally failed to produce convincing support for this hypothesis. The aim of the present study is to investigate the issue of differentiation at the genetic and environmental level. Six psychometric measures assessing verbal and nonverbal cognitive abilities were administered to 209 Dutch twin… Expand
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