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From: werner@aecom.UUCP (Craig Werner)
Newsgroups: net.med
Subject: Re(2): Neurotransmitters & Schizophrenia
Message-ID: <1336@aecom.UUCP>
Date: Sat, 30-Mar-85 12:31:13 EST
Article-I.D.: aecom.1336
Posted: Sat Mar 30 12:31:13 1985
Date-Received: Tue, 2-Apr-85 22:07:20 EST
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Organization: Albert Einstein Coll. of Med., NY
Lines: 18

> 
> The  twin  studies  demonstrated  a  genetic  predisposition  but  it  only
> accounted  for  ~14%  of the variance.  Early environmental factors were of
> greater importance (eg: being raised by/in a schizophrenic family).
> 		The Polymath (aka: Jerry Hollombe)

	Of course, Jerry brings up a point which clouds Heritability studies.
It`s very hard to tell how much of a risk of Schizophrenia comes from being
raised in a schizophrenic family and how much of the risk was inherited by
nature of being born into a schizophrenic family, and how much the two 
interact.
	The result is that genetic dispositions are generally underestimated
(on the side of statistical caution) -- which is probably a good thing
anyway.
-- 
				Craig Werner
				!philabs!aecom!werner
		What do you expect?  Watermelons are out of season!