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Re: st: Hierarchical CFA problem


From   Alan Acock <acock@mac.com>
To   "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
Subject   Re: st: Hierarchical CFA problem
Date   Mon, 22 Apr 2013 10:31:39 -0700

You could fix the error term at zero to get a solution but the solution might not be good
Alan Acock

Sent from my iPhone

On Apr 22, 2013, at 6:32 AM, "JVerkuilen (Gmail)" <jvverkuilen@gmail.com> wrote:

> On Mon, Apr 22, 2013 at 4:31 AM, W Robert Long <W.R.Long@leeds.ac.uk> wrote:
> 
> The key is in the lavaan output:
> 
>>    L1                0.192    0.170
>>    L2                0.709    0.107
>>    L3                0.272    0.069
>>    G                 0.617    0.183
> 
> Notice how small the variance of L1 is, and how large its SE is. This
> is indicative of a log-likelihood that is close to being irregular, in
> this case probably having a mode at or close to 0 for L1's variance.
> L3 has a slightly higher variance but a markedly lower standard error,
> which means it has a proper peak. While you shouldn't use these
> standard errors to compute hypothesis tests or confidence intervals,
> they are highly indicative of problems with a model. So I'm not
> surprised difficult cleaned things up.
> 
> (lavaan is a nice piece of kit, by the way.)
> 
> -- 
> JVVerkuilen, PhD
> jvverkuilen@gmail.com
> 
> “He uses statistics as a drunken man uses lamp-posts – for support
> rather than illumination.”--Andrew Lang
> 
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