Gatekeeping Role
Definition
The function assigned to the trial judge under Daubert and FRE 702 to assess whether proposed expert evidence meets the reliability threshold before it reaches the jury. The judge must conduct this review even when the evidence concerns a well-established discipline, and must document the basis for admission or exclusion.
- Basis
- Daubert and Federal Rule of Evidence 702
- Performed by
- The trial judge, before evidence reaches the jury
- Applies even to
- Well-established disciplines
- Requirement
- Judge must document the basis for admission or exclusion
Common questions
Why must a judge still review well-established disciplines under this role?+
Daubert's reliability standard applies to the specific methodology and application in the case at hand, not just to the discipline's general reputation, so even a long-accepted field like fingerprint or DNA analysis can be challenged on how it was applied in a particular matter.
What happens if a judge admits expert evidence without documenting the reliability basis?+
An undocumented admission decision is more vulnerable to appellate reversal, since appellate courts review whether the trial judge actually performed the gatekeeping analysis rather than simply accepting the expert's credentials or the field's general standing.
Is the gatekeeping role identical across every US jurisdiction?+
No, federal courts and most states follow Daubert-based standards, but some states retain Frye's general-acceptance test, so the specific gatekeeping analysis a judge performs depends on which standard the jurisdiction has adopted.
Related terms
- Bharatiya Sakshya Adhiniyam 2023 (BSA 2023)
- India's evidence law replacing the Indian Evidence Act 1872, governing admissibility of expert testimony (Section 39) including forensic phonetic evidence. Does not...
- Criminal Procedure Rules Part 19
- The English and Welsh procedural rules governing expert evidence in criminal proceedings. They impose a duty on the expert to help the...
- Daubert Standard
- The US federal evidentiary standard (Daubert v. Merrell Dow Pharmaceuticals, 1993) requiring that expert testimony be based on scientifically valid methods with...
- Federal Rule of Evidence 702
- The US federal rule governing expert testimony. As amended through 2023, it requires that expert opinion be based on sufficient facts or...
- Frye Test
- An admissibility standard derived from Frye v United States (DC Cir 1923) requiring that a scientific technique must have gained general acceptance...