title: Studies designed to disentangle genetic and environmental variables in schizophrenia: some epistemological questions and answers.
abstract: The author addresses questions raised by Dr. Lorna S. Benjamin in the preceding paper. He quotes from the original studies to respond to questions regarding statistical logic, the relative prevalence of schizophrenia among half-siblings and parents of index adoptees, and the possible role of socioeconomic status as a confounding variable.
mesh_terms: D000300:Adoption; D005190:Family; D006801:Humans; D010290:Parents; D011594:Psychometrics; D012107:Research Design / Q000592:standards; D012559:Schizophrenia / Q000235:genetics*; D012923:Social Class; D012931:Social Environment; D013223:Statistics as Topic