Context There are many published twin studies of schizophrenia. Although these studies
have been reviewed previously, to our knowledge, no review has provided quantitative …

That genetic factors contribute to the etiology of schizophrenia is no longer debated; the
nature and magnitude of that contribution, however, are still open for discussion. In this …

In recent years schizophrenia has been assumed to be largely a genetic disease with
heritability estimates, derived primarily from family and twin studies, of 80%–85%. However …

Multiple research paradigms have provided evidence for a substantial genetic component in
the etiology of schizophrenic disorders. This article reviews the major research strategies …

This study investigated the factor structure and etiology of four self-report schizotypy
questionnaires during young adulthood (age 18–27) in 98 monozygotic and 59 same-sex …

Twin studies have been vital for establishing an important genetic contribution to the etiology
of schizophrenia. The five newest studies since 1995 from Europe and Japan have …

Background Twin studies have provided evidence that both genetic and environmental
factors contribute to schizophrenia (SZ) risk. Heritability estimates of SZ in twin samples …

Abstract In the “Special Report on Schizophrenia” published in the Schizophrenia Bulletin in
1987, the genetic basis of schizophrenia was reviewed. Here, we provide our perspective on …

Background The magnitude of heritability of schizophrenia remains controversial, due in part
to limitations of estimates derived from index twin pairs exclusively. We applied structural …

Although generally accepted that schizotypal personality disorder diagnosis is more
prevalent among relatives of individuals with schizophrenia and may be associated with …