[2] In other words, the measurements are taken by a single person or instrument on the same item, under the same conditions, and in a short period of time.
[5] If the correlation between separate administrations of the test is high (e.g. 0.7 or higher as in this Cronbach's alpha-internal consistency-table[6]), then it has good test–retest reliability.
[citation needed] The standard deviation under repeatability conditions is part of precision and accuracy.
[citation needed] An attribute agreement analysis is designed to simultaneously evaluate the impact of repeatability and reproducibility on accuracy.
It produces statistics that evaluate the ability of the appraisers to agree with themselves (repeatability), with each other (reproducibility), and with a known master or correct value (overall accuracy) for each characteristic – over and over again.