An evidence concept defining admissibility, foundation, or protected communications in civil adjudication. It governs what information may be presented and how reliability, prejudice, and confidentiality concerns are addressed. It does not permit admission without required foundation and does not defeat valid protections when their elements are satisfied. It materially affects fact-finding by shaping the record available to the decisionmaker and the costs of litigation. The concept is generally stable, though rule amendments and interpretive developments may refine application over time.

Principle

Evidence based on scientific techniques should be admitted only when those techniques are broadly accepted by practitioners and researchers in the pertinent discipline, reflecting community consensus as a proxy for reliability.

Demonstration

A court confronted with polygraph evidence will examine whether the psychological and physiological methods underlying polygraph testing are generally accepted by relevant scientists before allowing the results as expert evidence.

Misapplication

Rigidly excluding emerging, validated methodologies because they lack widespread acceptance can prevent useful, trustworthier science from reaching the factfinder; conversely, admitting widely accepted but methodologically flawed techniques misapplies the principle.

Consequence

When applied, Frye tends to be conservative about admitting new scientific evidence, prioritizing communal consensus and potentially slowing the introduction of novel but reliable methods.

Reversal

The Daubert approach inverts Frye’s preference for consensus by empowering the judge to evaluate methodological validity even in the absence of general acceptance.

Boundary

Used historically in many U.S. state courts and still controlling in some jurisdictions; it specifically addresses scientific techniques and does not govern non-scientific expert specialties or routine factual evidence.

Semantic Tension

There is tension between deference to scientific community consensus (favoring stability) and the need for judicial scrutiny of method validity (favoring adaptability and case-specific evaluation).

Synthesis

Frye is a consensus-centered admissibility standard that admits scientific evidence only when the relevant community has generally accepted the underlying technique or principle, trading methodological inquiry for communal assurance.