Social contact, social attitudes, and twin similarity

@article{Posner1996SocialCS,
  title={Social contact, social attitudes, and twin similarity},
  author={Samuel F. Posner and Laura Baker and Andrew C. Heath and Nicholas G Martin},
  journal={Behavior Genetics},
  year={1996},
  volume={26},
  pages={123-133}
}
The nature of the relationship between social contact and attitude similarity between twins was investigated using longitudinal data from a sample of Australian twins. Earlier research has suggested that social attitudes are not explained solely by shared environment; rather there are both genetic and environmental components that explain variance in social attitudes. Using three types of analyses we investigated the magnitude of the relationship and the direction of causation between attitude… 
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