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From: cooper@pbsvax.dec.com
Newsgroups: comp.ai
Subject: Twin studies (was AIList V6 #86 - Philosophy)
Message-ID: <8805201729.AA28919@decwrl.dec.com>
Date: 20 May 88 17:29:09 GMT
Organization: Digital Equipment Corporation
Lines: 21

> <<Richard O'Keefe claiming that studies of separated identical twins being
>   invalid because of a tendency for their environments to continue to
>   be the same.>>

I can't say that I am overly familiar with this area, but all the "separated
twin" studies which I have seen discussed as evidential (rather than merely
suggestive of further research) have seemingly controlled for this by
comparing the variance of the characteristic under study in identical
twins separated at birth (100% genetic similarity) against fraternal
twins separated at birth (50% genetic similarity).  Is there a significant
body of studies which I am unfamiliar with, or is there some reason to
believe that the treatment of identical twins after separation is
substantially different from the treatment of fraternal twins after
separation?


		Topher Cooper

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