Expert Testimony Admissibility: Federal vs. State Court
Federal courts apply a reliability-based gatekeeping framework that considers the methodology's testability, peer review, error rate, controlling standards, and general acceptance. State courts vary: some apply a similar reliability framework, others apply a narrower general-acceptance test, and several use distinctive hybrid frameworks. Experts should prepare testimony that satisfies the most demanding of the potentially applicable standards. Attorneys are responsible for confirming the governing framework against primary sources.
Federal-court framework
Federal courts apply a reliability-based gatekeeping framework (Daubert v. Merrell Dow Pharmaceuticals, Inc., 1993; Kumho Tire Co. v. Carmichael, 1999). The trial judge evaluates whether the expert's methodology is reliable and reliably applied to the case, considering factors such as testability, peer review and publication, known or potential rate of error, the existence of controlling standards, and general acceptance in the relevant field. The factors are non-exclusive and the analysis is case specific.
State-court frameworks
Some states apply a similar reliability framework to the federal courts. Other states retain a narrower general-acceptance framework that focuses on whether the methodology is generally accepted in the relevant scientific community (Frye v. United States, 1923). Several states have distinctive hybrid frameworks, sometimes codified by statute or rule.
Verify the governing framework
Always confirm the governing admissibility framework for the specific case against primary sources before preparing expert testimony. The framework can vary by case type, by court within the same state, and over time as state law evolves.
Frequently Asked Questions
Do all federal courts apply the admissibility framework identically?
The framework is uniform across federal courts, but application varies by circuit and by trial judge. Prior decisions in the same district and circuit are informative for case preparation.
Related
References
- Daubert v. Merrell Dow Pharmaceuticals, Inc., 509 U.S. 579 (1993). supreme.justia.comCase Law
- Kumho Tire Co. v. Carmichael, 526 U.S. 137 (1999). supreme.justia.comCase Law
- Frye v. United States, 293 F. 1013 (D.C. Cir. 1923). law.justia.comCase Law
- Testimony by Expert Witnesses, Federal Rules of Evidence. law.cornell.eduCase Law
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