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  • Stephen Biss

Why Does the ATC Say Single Point Control Tests are Good Enough?


Purpose:

To explore the differences between a measurement instrument that has a linear relationship between the thing measured and the result v. a measuring instrument that has a calibration curve.

To search for an admission that the calibration curve can shift up or down, left or right, or rotate around a point over time.

To cross-examine the CFS expert on the lack of empirical study supporting the ATC/CFS hypothesis that a single point control test can always detect drift.

To obtain admissions about the differences between new instruments and aging instruments.

#aging #calibrationcurve #linearity #controltest #drift

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