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The goal of equating is to establish an effective equivalence between scores on two test forms such that the scores from each test form can be used as if they had come from the same test.
Equating is the strongest form of linking between test scores, whereas prediction is considered the weakest.
The impact of all of those differences on statistical equating is not clear at present.
Statistical equating is supported by robust statistical and mathematical theory, although of course its suitability depends heavily on the assumptions of the mathematical underpinnings being met in practice.
If statistical equating is better than judgemental equating, as MRCP UK) used previously, then the conclusion once more has to be that the greater annual variation in Part 1 is real, that the quality of the candidates is indeed better at diet 3 than the other two diets, and that using a judgemental standard-setting method had failed to find that effect reliably.
Since the reference group for MRCP UK) examinations is UK graduates taking the examination, the estimation of IRT parameters and the statistical equating is restricted to those candidates but the same pass mark can then be applied to all candidates taking the examination.
Similar(54)
"Our confidence in the accuracy of the equating was reconfirmed," CTB told Indiana in a memorandum on Jan . 18 , 1999
Various forms of pre-treatment equating are available (see e.g. Rässler 2002; Rubin 2006).
He is equating being gay with being impure, unholy, in need for repentance and forgiveness.
Statistical equating was introduced for the MRCP UK) written examinations during 2008 and 2010.
The differences shown by equating are probably real for Part 1.
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Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com