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Re: st: Linearity assumption in polychoricpca


From   "JVerkuilen (Gmail)" <jvverkuilen@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Linearity assumption in polychoricpca
Date   Thu, 25 Apr 2013 13:51:28 -0400

On Thu, Apr 25, 2013 at 1:25 PM, Shivani Wadehra <shivani2408@gmail.com> wrote:
> Dear statalister
>
> I am using polychoricpca command in Stata, just wanted to know whether the
> assumption of linearity of data also an assumption in polychoricpca?

The point of using polychoric correlations is to ameliorate the
nonlinearity implied by the nature of categorical data, which are not
well-approximated by a linear decomposition. It may not succeed, of
course.
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