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Download full textBergstrom, Betty A.; And Others – 1993
A problem that arises when a differential item functioning (DIF) study is done with samples of examinees differing in ability is examined. A test may function differently when the populations from which the items are calibrated are not of equal ability. Since the lower ability examinees get many difficult items incorrect, the spread (standard…
Descriptors: Ability, Error of Measurement, Grade 11, Grade 12
