[Rasch] evidence of validity?

Mike Linacre rmt at rasch.org
Thu Jan 3 22:31:33 EST 2013


Shirin:

Item maps are informative about construct and content validity. For 
instance, for the construct validity of an arithmetic test, we expect 
the "addition" items to be at the "easy" end of the map, and the 
"division" items to be at the "hard" end of the map. For its content 
validity, we don't expect to see "geography" items anywhere on the map.

Mike L.



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