by StaceyKoprince Mon Oct 06, 2008 2:43 pm
While the raw score to scaled score conversion can change over time, that change is not set to calibrate over periods of weeks or months. The scores are valid and comparable to all scores given in the previous 5-year period. They don't recalibrate things monthly because then test comparisons across students (who take the test at very different times) wouldn't be as valid.
Stacey Koprince
Instructor
Director, Content & Curriculum
ManhattanPrep