Posted by
Art Kendall on
URL: http://spssx-discussion.165.s1.nabble.com/Shapiro-Wilks-Statistic-tp5739693p5739709.html
You said you had ordinal data. When I have reviewed manuscripts where other
reviewers have raised the issue of level of measurement this is what I have
suggested.
Try CATREG in SPSS. CATREG does a test between models with different
assumptions about measurement level. See whether there is a meaningful
difference between MODEL fits with ORDINAL specification and INTERVAL
specifications. (You might also try a NOMINAL specification.)
If there is no meaningful difference in fits, use the interval level results
and add a footnote that CATREG showed no meaningful difference in fits when
ORDINAL was specified.
YMMV but I have tried this CATREG approach a dozen or so times and never
found a meaningful difference between the fits.
also see CATPCA in help
-----
Art Kendall
Social Research Consultants
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Art Kendall
Social Research Consultants