© D.L. Crumbley
Three guidelines for admissibility of expert testimony
The testimony should assist the trier of fact to understand the evidence or to determine a fact in issue.
The expert should have some minimum qualifications, which would include one or more of the following:
In addition, before providing testimony, the expert would have to show that the testimony (a) is based upon sufficient reliable facts or data, (b) is the product of reliable principles and methods, and (c) is the result of the application of established principles and methods to the facts in the case.
The reliability standards set for expert testimony are based on three pillars: (a) reliable data, (b) a reliable methodology, and (c) the reliable application of the methodology.
Source: AICPA Proposed Statement on Responsibilities for Litigation Services No. 1, December 1, 2001.