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Psychometrics has evolved as a subfield of psychology to become the science of measurement of unobservable individual characteristics.
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How to proceed when collapsing ordinal items with levels that got no answer?
I have a set of 8 Likert-type items with 9 levels each. In no case do we have an item for which responses fill all possibilities and this has shown to be an issue for the SEM I'm trying to run (as wel …