E-scape: Comparative Pairs
An important element in the e-scape system involves the use of 'comparative pairs' (also called 'comparative judgements') as a methodology. The e-scape system allows for pairs to be generated for comparison based on mathematical principles that produce a rank order of candidates in a way that is effective and reliable. The e-scape system allows this to be on screen.
Interview notes of Prof. R Kimbell and Tony Wheeler of Goldsmiths University taken from the Teachers TV programme School Matters - E-assessment - Where Next? are available to download from the TTV website. The notes explore the use of the comparative pairs method based on e-scape experience with Design and Technology assessment trials.
Links
Could Comparative Judgements Of Script Quality Replace Traditional Marking And Improve The Validity Of Exam Questions? - Cambridge assessment: a paper from 2004 on the validity of comparative pairs as an assessment process.
The law of comparative judgement: Wikipedia - a description and explanation of the principles that underlie the comparative pairs marking process.
The Rasch model: Wikipedia - the rationale that underpins using the comparative pairs method of assessment, expressed in the language of statistics.
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