Extracting meaning and direction from twin data.

I. I. Gottesman, G. Carey

Research output: Contribution to journalReview articlepeer-review

37 Scopus citations


This paper reviews the current status of the twin method as a research tool in psychiatry. It is shown that the common practice of reporting only probandwise concordance rates leaves much of the meaning unextracted from the data, and that by including appropriate estimates of the population risk, the concordance rates can be converted into liability correlation coefficients, which can be assessed within the theoretical framework of multifactorial-threshold-polygenic disorders.

Original languageEnglish (US)
Pages (from-to)35-50
Number of pages16
JournalPsychiatric Developments
Issue number1
StatePublished - Mar 1983


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