On 9 Feb 2011 at 8:06, Rick Froman wrote:

> This is all very interesting but I think the critical word in the
> statement is "choose" not "ideology".  Change in ideology over a
> lifetime (whether described in a series of anecdotes or systematically
> collected data) says nothing about whether those changes are
> determined or chosen. Science cannot provide any evidence for the fact
> that anyone chooses anything (which is not the same as saying that
> choice is impossible). The only possible observable and testable
> causes of all behaviors are biological/genetic (sometimes known as
> "nature") and environment (sometimes known as "nurture") and the
> interactions between them. Neither nature or nurture is chosen and
> choice as a cause of behavior is not a testable scientific hypothesis.

I'm not sure I follow all of this, but a testable question which can 
be asked is the extent to which variation in political attitudes is 
genetically-determined. Some results based on twin data:

Alford, J. et al (2005). Are Political Orientations Genetically 
Transmitted? American Political Science Review Vol. 99, p. 153--

http://www.apsanet.org/imgtest/GeneticsAPSR0505.pdf

The answer to their question seems to be "yes". In particular, they 
give a heritability estimate of 53%, with non-shared (unique) 
evironment contributing 36%, and shared (i.e. upbringing and such) a 
measly 11% (see p, 162). That's for "ideology", not party 
affiliation, note bene. 

A readable report  is here:
http://tinyurl.com/46jycs2

Stephen
--------------------------------------------
Stephen L. Black, Ph.D.          
Professor of Psychology, Emeritus   
Bishop's University
Sherbrooke, Quebec, Canada               
e-mail:  sblack at ubishops.ca
---------------------------------------------

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