[Rasch] About scale validity
Mike Linacre (RMT)
rmt at rasch.org
Tue Mar 21 21:05:59 EST 2006
What is your reviewer intending by "Scale validity"?
Is this referring to the validity of the measurement scale (usually in
logits) - answered by the fit of the data to the Rasch model,
or the validity of the rating scale (set of ordered categories) - answered
by various diagnostic Rasch indicators,
or the content/construct/predictive etc. validity of the observational
instrument (e.g., the "Role-based Behavior Scale") - requiring largely
non-Rasch investigation involving the substantive theory and application of
or perhaps something else?
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