title: Analysis of twin data and estimation of heritability effects.
abstract: In a statistical sense, the objective of twin research is to partition the variance on some criterion measure among genetic and environmental factors. Although certain elaborate models have been developed, these models do not supply a convenient test statistic to show which factors make a significant contribution. Consequently several procedures drawn from analysis of variance have been adapted for use with twin data.
mesh_terms: D000367:Age Factors; D000704:Analysis of Variance; D004777:Environment; D005260:Female; D014644:Genetic Variation; D005826:Genetics, Medical; D006801:Humans; D007223:Infant; D007360:Intelligence; D008722:Methods; D011247:Pregnancy; D014427:Twins; D014430:Twins, Monozygotic