[Rasch] Rating scale and partial credit model with identical responses

Rama Guinda guinda36 at hotmail.com
Mon Jun 26 17:00:14 EST 2006


Dear all,
If  on a set of polytomous items or Likert scale items students get the
same score on each individual item, is it a problem for Rasch analysis?
Suppose, the response vectors for 5 polytomous items for 5 respondents
are:
44444
33333
55555
11111
44444
And this pattern continues for all respondents.
This could well be the case when there is complete agreement among
judges in rated performances, which could be the result of good training
and the existence of a well defined rating scale.
Thanks
Rama

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