Specific cognitive abilities in 5- to 12-year-old twins.

@article{Foch1980SpecificCA,
  title={Specific cognitive abilities in 5- to 12-year-old twins.},
  author={T T Foch and Robert Plomin},
  journal={Behavior genetics},
  year={1980},
  volume={10 6},
  pages={507-20}
}
Eleven tests of specific cognitive abilities were administered to 108 pairs of young twins (average age of 7.6 years). Internal consistencies are high for all measures except Raven's Coloured Progressive Matrices and Delayed Picture Memory. Two-month, test-retest reliabilities are also reported. The twin sample is representative in terms of both means and variances when compared to normative data from standardization samples, and twin correlations for height and weight are similar to those… CONTINUE READING

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