Antw: [Rasch] Item format and model choice

Moritz Heene heene at
Mon Jun 4 17:50:10 EST 2007

My choice in situations where the local stochastic independence of the item reponses is violated because of "scaffolded" items is the steps model of Verhelst, Glas, and de Vries (1997).
It's implemented in Winsteps.


Moritz Heene.
Verhelst N.D., Glas C.A.W. & De Vries H.H. (1997) A Steps model to analyze partial credit. In W.J. van der Linden & R.K. Hambleton (Eds.), Handbook of modern item response theory (pp. 123 - 138) New York: Springer.

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