Tuesday, March 29, 2016

Copy Detector - KJS

The copy detector has more information to work with using knowledge and judgment  scoring (KJS) than with right mark scoring (RMS). Now Omit is a mark rather than an error in a guessing game.

There is no distinct break in the beginning of the pairing index and at the end of the pairing count plots to confirm cheating on this test.

The two most suspect answer sheets have a string of 26 identical marks. That does not occur on the four reference pairs. This becomes presumed cheating if this high a score was not characteristic of one of these two students.

Confirmation requires a repeat of this magnitude or a classroom observation during the next test. A repeat performance while in a secure environment would reject presumed cheating.

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