One of the Daubert prongs of admissibility for scientific expert testimony is the known or potential error rate of a technique. Thus, examiners are often asked about the discipline error rate on the stand. Numerous error rate studies have been undertaken in an attempt to provide this number. But just what is really sought? What are the different types of error rates? How are they calculated and what do they mean? This lecture will describe some commonly reported error rates for pattern evidence, and will demonstrate how to calculate them. Read more here.Funding for this Forensic Technology Center of Excellence event has been provided by the National Institute of Justice.