1. The methods available for genetic investigations in man are the pedigree or family history
method, the contingency method of statistical prediction, and the twin study method. 2. A
study of the relative effects of hereditary and environmental factors in the development ...

The investigative data available at this time may be summarized as follows: 1. In comparing
the family backgrounds of preadolescent schizophrenia case (52 twins and 50 singletons
under age 15) with those of a comparable adult sample (691 twin index cases), no ...

IF there are some colleagues among the European members of the Congress, who are
familiar with the history, volume and general objectives of our research in psychiatric
genetics and social psychiatry during the past 25 years, they will need no descriptive ...

... treatment and by restricting ourselves to the data of one investigator (Kallman, 1938, 1946 ...
DISCUSSION Our analysis leads to the same genetic hypothesis as that put forward by ... class
of individuals, but Slater (1968), recalculating the age correction for Kallmann's data, arrived ...

... Statist. Med., 4, (I) (1953). Böök, JA , Genetic Aspects of Schizophrenic Psychosis. Proc. ... Press,
1963). Ford, EB , Ecological Genetics (Methuen, London, 1963). Huxley, JS , Heredity, 9, 1 (1955).
Kallmann, FJ , Amer. J. Psychiat., 103, 30 (1946). Kallmann, FJ , Dis. Nerv. ...

... had been raised by those most skeptical of the genetic evidence that the environment, not the
genes, provided by ... In: Kaplan, AR, ed. Genetic Factors in “Schizophrenia” Springfield, III.: Charles
C Thomas, Publisher, 1972. ... Schizophrenia: Evidence for the major gene hypothesis. ...

... Behavior Genetics, 12 (1982), pp. ... Genes, personality, and psychopathogy: A latent class analysis
of liability to symptoms of attention-deficit hyperactivity ... Discussion of “Genetic influence on
parent-reported attention-related problems in a Norwegian general population twin ...

... (1978) and Baron (1982) used Kallmann's classification of ... that this phenomenon does not exist
may be unrealistic, as epistasis is likely to characterize multiple gene systems. ... 1971), both of
these issues are relevant to schizophrenia and may affect the results of genetic analysis. ...

... How various genetic and environmental factors interact to cause schizophrenia and ... Etiological
heterogeneity, complex patterns of gene–gene and gene–environment interaction ... Epidemiology;
Genetics; Environmental risk factors; Incidence; Chromosomes; Genes; Prevalence;

... RJ, Glynn MF, Brewer GJ (1963) Studies on the correlation of the genetically determined trait ...
J Neurol Neurosurg Psychiatry 32:88–93. Kallmann F (1938) The genetics of schizophrenia. ...
Springer, Berlin Heidelberg New York. Vogel F, Propping P (1983) Genetic variability and its ...