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Predictive models of question difficulty - A critical review of the literature
By Debra Dhillon Published 1 Feb 2003
An investigation into the accuracy of A-level predicted grades
By Martin Delap Published 1 Jun 1994
Aggregation and awarding methods for national curriculum assessments in England and Wales: a comparison of approaches proposed for Key Stages 3 and 4
By Mike Cresswell Published 1 Apr 1994