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And one I'm not at liberty to answer.

You are not at liberty to answer or you don't know the answer? I guess you don't know it. But I know, if not precisely, to some extent how it is done. Rasch-based test equating method is applied. And how this is done is what I am interested to learn.
Farhad
And one I'm not at liberty to answer.

You are not at liberty to answer or you don't know the answer? I guess you don't know it. But ... is done. Rasch-based test equating method is applied. And how this is done is what I am interested to learn.

Well, I don't really know what you're asking about here, Farhad. It's sounds as though you're talking about a grading methodology - please tell us some more. Or are you talking about how exam papers are actually marked?
DC
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