The intro. text I use has a table of average correlations for IQ 
scores for siblings, DZ  twins, MZ twins, the latter raised together 
and apart, etc. Does anyone know of a source for  similar 
compilation of correlational data for any other trait?

Thanks,

  
Joanne Gallivan, Professor of Psychology
University College of Cape Breton
Sydney, Nova Scotia, Canada, B1P 6L2
902-563-1217
[EMAIL PROTECTED] 

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