[Rasch] Measure from one item response
slu at ccsr.uchicago.edu
Sat Sep 22 08:32:39 EST 2012
On Sat, 2012-09-22 at 08:15 +1300, Mike Linacre wrote:
> Yes, we can do the calculation, but what is the range of responses? 0-4 or
> 1-5? Or is the bottom step difficulty, 0, a place-holder, so that the
> response range is 1-4?
Right. The response range is 1-4, so the bottom step difficulty is the
> One method is at http://www.rasch.org/rmt/rmt122q.htm with L=1. This is
> awkward by hand, but straightforward with Excel.
Great. Thanks very much.
Stuart Luppescu <slu at ccsr.uchicago.edu>
University of Chicago
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