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JL Chapter 3 The Combined Sample
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adult alike analysis ankylosing spondylitis appears birth cancer chapter childhood concordance rates correlation degree of contact degree of separation developmental diagnosis disease disorder Dominoes Dource effects enuresis environment environmental evaluation example F R/R factors full-scale IQ genetic determination genotype heritability estimates heterochromia histories hospital hypertension hypothesis identical twins included indicate Individuals Total Variance influence interaction intraclass correlation investigators IQ scores issue Jensen Juel-Nielsen literature males and females McKusick Mean 2quare menarche menopause menstruation mental Mill Hill mo yes monozygotic mother MZ twins reared Newman normal noted onset overall Pairs Individuals Total parents partners patterns percent personality population probably problem psychological psychosis question reared-apart rheumatic fever schizophrenia seems sets reporting Shields Shields's similar standard deviation strabismus suggested symptoms tion Total Variance Ratio traits twin studies twin-reared-apart variables Variance Component varicose veins verbal and performance yes child zygosity