Re: st: Nominal or ordinal?

[Richard Williams <richardwilliams.ndu@gmail.com>]

At 09:06 PM 8/12/2010, Alan Acock wrote:
> I don't have a hand reference, but if you generate a series of 
> monotonic transformations of an interval scale, the linear 
> correlations of each transformation with the interval scale variable 
> will almost all be over .9. Of course, a non monotonic 
> transformation would not do this, nor would it be ordinal. Also, it 
> is possible to have an extreme monotonic transformation for which a 
> straight line does terribly.
> Alan Acock
> acock@mac.com
Alan, can you clarify? Are you talking about, say, different ways of 
collapsing a variable into 5 categories, where you use different 
cutpoints each time?  Or something else?

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Richard Williams, Notre Dame Dept of Sociology
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