Seymour Kety's Danish adoption study found genetic evidence for schizophrenia by comparing adopted individuals with schizophrenia to both their biological and adoptive relatives, showing that schizophrenia correlates with biological rather than adoptive family membership, demonstrating that genetics alone transmit the trait.
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Robert SapolskyEvidence Quote
“This was the Danish adoption study that they did with every case in Denmark, or whatever Scandinavian country they wound up in, looking at whether there was or whether there was or wasn't schizophrenia and the adoptive family and the biological, and we know this whole thing. And the number nine was the first screaming evidence of a genetic component to schizophrenia.”
Created: 8/12/2026, 5:59:56 PM
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