Research library
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By Lena Gray, Emma Armitage, Ruth Johnson, Stephen Wooding
Published 1 Aug 2018 -
Difficulty plots: DIF analysis without the partial credit model
By Elizabeth Harrison
Published 5 May 2017 -
By Jo-Anne Baird, Lena Gray
Published 16 May 2016 -
By Lena Gray, Claire Jackson, Lindsay Simmonds
Published 1 Dec 2015 -
An Experimental Examination in General Studies
By R. A. C. Oliver
Published 1 Dec 1955 -
A General Paper in the General Certificate of Education Examination
By R. A. C. Oliver
Published 1 Jul 1954
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