R help - May 2004 - please help with estimation of true correlations andreliabilities

Dear John,
Dear Joseph,

Thank you for your quick answers and the pointer to semnet. 
I try to clarify on my assumptions:

- yes, I am willing to assume multivariate normality
- no, I don't want to assume a single factor model
- I assume there is an unknown number of factors, and I do not know which
items belong to which factors

but I still want to estimate single item reliabilities

Is this impossible?
How can one specify such unspecified model to sem?
Which (exploratory?) function would me help doing this?
Or just: what should I read?

Thanks for any help


Jens Oehlschl??gel

--

Dear Jens,

If you're willing to assume multinormality but don't have in mind a
specific model to estimate, then why not use factanal? The uniquenesses
are estimates of the unreliability of the items.

I hope this helps,
 John

On Thu, 13 May 2004 17:09:14 +0200 (MEST)
 "Jens Oehlschl??gel" <joehl at gmx.de>
wrote:
> 
> Dear John,
> Dear Joseph,
> 
> Thank you for your quick answers and the pointer to semnet. 
> I try to clarify on my assumptions:
> 
> - yes, I am willing to assume multivariate normality
> - no, I don't want to assume a single factor model
> - I assume there is an unknown number of factors, and I do not know
> which
> items belong to which factors
> 
> but I still want to estimate single item reliabilities
> 
> Is this impossible?
> How can one specify such unspecified model to sem?
> Which (exploratory?) function would me help doing this?
> Or just: what should I read?
> 
> Thanks for any help
> 
> 
> Jens Oehlschl??gel
> 
> --
> 
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--------------------------------
John Fox
Department of Sociology
McMaster University
Hamilton, Ontario, Canada
http://socserv.mcmaster.ca/jfox/