can correlation alone be useful?..have seen studies interpreting twins using correlation coefficient alone.. will it be enough to tell the role of genetics in diseases..?..if not, which other tests can be done?...came across this two tests heritability estimate and proband concordance..but there are mixed reviews about this tests...please suggest me how to carry on..
regards
ANU
If a study of MZ/DZ twins shows higher intra-pair correlations in MZ than in DZ twins, that suggests that heredity may play a role and that it may be worthwhile to search for genes. Note that it doesn't constitute proof and the estimate may be off. However, there's not much use in putting in a great effort to determine the exact heritability using additional populations because a heritability doesn't actually tell you a lot (see attached publications).
Article Heritability estimates in behavior genetics: Wasn't that sta...
Article Estimating heritabilities in quantitative behavior genetics:...