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low sensitivity will have more False Acceptance errors and
fewer False Reject Errors. As the sensitivity increases, the
number of False Acceptance Errors will decrease, but more
authorized persons will be subject to a False Reject Error. At
one point, as seen in the diagram below, the two error types will
intersect. This point of intersection is known as the Crossover
Error Rate (CER) or sometimes as the Equal Error Rate (EER).
This is the setting at which the device will have the lowest
overall errors. However, in a very secure facility, the device may
be set to a higher sensitivity to reduce the number of False
Acceptance Errors to a lower level.
