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Mplus Discussion > Categorical Data Modeling >
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 Anonymous posted on Wednesday, March 30, 2005 - 4:56 pm
I have a measure with ordinal items. As it measures illness and many respondents are not ill there are a number of the items which have a very low response rate at the most extreme (severe) category (e.g., 10/1500 responding '4' on a 1-4 scale). Is there a point at which one should consider collapsing categories? My specific analyses involve EFA/CFA, but any thoughts on the issue more generally would also be welcome. Thanks.
 BMuthen posted on Saturday, April 02, 2005 - 9:02 pm
See Muthen (1989) in the special issue of Sociological Methods & Research. It should be in the reference list on the website.
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