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Assessing comparability of optional questions
By Elizabeth Harrison
Published 4 Dec 2018 -
Difficulty plots: DIF analysis without the partial credit model
By Elizabeth Harrison
Published 5 May 2017 -
By Melissa Jackson, Rachel Lismore-Burns
Published 23 Mar 2012 -
Predictive models of question difficulty - A critical review of the literature
By Debra Dhillon
Published 1 Feb 2003