Rule 702 — Testimony by Expert Witnesses

Fed. R. Evid. 702

• Source: Federal Rules of Evidence
• Rule: 702
• ARTICLE VII: OPINIONS AND EXPERT TESTIMONY
• Citation: Fed. R. Evid. 702

Text

A witness who is qualified as an expert by knowledge, skill, ex-
perience, training, or education may testify in the form of an
opinion or otherwise if the proponent demonstrates to the court
that it is more likely than not that:

(a) the expert’s scientific, technical, or other specialized
knowledge will help the trier of fact to understand the evi-
dence or to determine a fact in issue;
(b) the testimony is based on sufficient facts or data;
(c) the testimony is the product of reliable principles and
methods; and
(d) the expert’s opinion reflects a reliable application of the
principles and methods to the facts of the case.

Advisory Committee Notes

(As amended Apr. 17, 2000, eff. Dec. 1, 2000; Apr. 26, 2011, eff. Dec. 1, 2011; Apr. 24, 2023, eff. Dec. 1, 2023.)