Joseph Wagner wrote:
Thank you for your response. My data is in -wide- format. In order
to use -ologit- or -gllamm-, does my data necessarily need to be in
-long- format? I am guessing that either I need to or I have set up
-ologit- and -gologit- incorrectly since the coefficient and p-value I
get are quite different. Looking at the table it appears there isn't
a difference between the two time points and the results I get from
your programming supports this.
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Yes; the data need to be -reshape-d long in order to use -ologit- or -gllamm-.
Inspection of the -ordplot- plot leads me to the same conclusion that you've
drawn: the scores are essentially the same between the two observation time
points. (I'm sorry for my confusion over the relation between -ordplot- and
-distplot-. Thanks to Nick for straightening me out on this.)
Ralph B. D'Agostino, Sr., has written on robustness of Student's t test for
ordered categorical data--did you get the chance to try -mvrepeat- or -ttest-
and compare its results to the others'?
Joseph Coveney
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