[Rasch] Fwd: Re: Fwd: CCA query

Mike Linacre rmt at rasch.org
Tue Apr 24 04:55:58 EST 2012

Thank you for asking for our suggestions, Michael.

How about investigating DPF (Differential Person Functioning). We expect 
that random behavior will cause a considerable drop in person measure? Also 
compute a person-by-stage misfit statistic. We would expect misfit to 
considerably increase in the presence of random behavior.

Mike Linacre

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