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Journal of Child Psychology and Psychiatry, and Allied Disciplines|September 19, 2002
Parent-offspring resemblance for reading performance at 7, 12 and 16 years of age in the Colorado Adoption ProjectS J Wadsworth, R P Corley, J K Hewitt, et al.Journal of Child Psychology and Psychiatry, and Allied Disciplines|October 1, 1993
Hyperactivity and spelling disability: testing for shared genetic aetiologyJ Stevenson, B F Pennington, J W Gilger, et al.Behavior Genetics|November 1, 1979
Multivariate behavioral genetic analysis of twin data on scholastic abilitiesR Plomin, J C DeFriesActa Geneticae Medicae Et Gemellologiae|January 1, 1988
Multiple regression analysis of twin data: etiology of deviant scores versus individual differencesJ C DeFries, D W FulkerChild Development|April 1, 1983
Parental contributions to longitudinal stability of cognitive measures in the Colorado Family Reading StudyJ C DeFries, L A BakerTwin Research : the Official Journal of the International Society for Twin Studies|November 11, 1999
Etiology of covariation between reading and mathematics performance: a twin studyV S Knopik, J C DeFriesDevelopmental Medicine and Child Neurology|April 1, 1981
Cognitive ability profiles in families of reading-disabled childrenS N Decker, J C DeFriesMultivariate Behavioral Research|January 30, 2016
Factor Analysis Of Genetic And Environmental Correlation MatricesC B Crawford, J C DeFriesPageof 10