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Re: st: reliability with -icc- and -estat icc-

From   "JVerkuilen (Gmail)" <>
Subject   Re: st: reliability with -icc- and -estat icc-
Date   Tue, 26 Feb 2013 21:22:11 -0500

On Tue, Feb 26, 2013 at 9:03 PM, Nick Cox <> wrote:
> Psychometrics is not my field

It is mine, though. ;)

but my gut impression is that you really
> should use the scores. The context you cite is no doubt correct, but
> for comparing raters with each other the scores they gave are
> essential.

Yes, that's right, unless the transformation is desired to be done all
the time, but rank transforming is then a bad idea, most likely,
because it's massively lossy.

 Why is skewness implied to be a problem here? It's just one
> of the facts.

It's also not really that bad once you condition on person, except for rater 4.
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