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Mastery Thresholds
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LSAT
LSAT.321 Mastery Thresholds
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A prep course chooses its mastery cutoff after seeing that most students scored between 78 and 82 percent. It then sets the cutoff at 78 percent so nearly everyone qualifies. What is the main methodological problem?
A
The threshold was adjusted to fit observed results rather than set in advance from the level of performance the program intends mastery to predict.
B
A mastery threshold must always be exactly 85 percent.
C
Student data should never influence future curriculum design.
D
The course should choose the highest observed score as the cutoff.
E
Timing should be excluded whenever a cutoff is revised.
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