REVIEW BIAS:
In studies of diagnostic accuracy, a bias that occurs when an investigator, or clinician completing the measurements, knows the results of the new diagnostic test when they are interpreting/scoring the gold standard (comparison) test1. Or vice versa: A bias that occurs when they know the results of the gold standard test, while they are interpreting/scoring the new diagnostic test1.
Review Bias is a type of Information Bias that occurs due to a lack of blinding when completing clinical measurements; and thus can be avoided by ensuring all measurements are conducted by those who are unaware of previous test results. Also see: Diagnostic Review Bias, Observer Bias, and Information Bias.
Reference:
1. Porta M, ed. A Dictionary of Epidemiology. Sixth ed. New York, NY: Oxford University Press 2014. (Link to Reference)