Frye v. United States
Doctrine Established:General Acceptance Test for Scientific Evidence
Why is Frye v. United States significant?
Frye established the 'general acceptance' test for the admissibility of scientific evidence, which dominated American evidence law for seventy years. The standard required that a scientific technique be generally accepted in the relevant scientific community before it could be admitted as evidence. Although superseded in federal courts by Daubert, the Frye test remains the standard in several states.
Why This Case Matters
Frye established the 'general acceptance' test for the admissibility of scientific evidence, which dominated American evidence law for seventy years. The standard required that a scientific technique be generally accepted in the relevant scientific community before it could be admitted as evidence. Although superseded in federal courts by Daubert, the Frye test remains the standard in several states.
Facts
James Alphonzo Frye was convicted of second-degree murder. Prior to trial, his attorney sought to introduce the results of a systolic blood pressure deception test, a precursor to the modern polygraph, to demonstrate Frye's truthfulness. The defense offered an expert to testify about the test and its results, which purportedly showed that Frye was telling the truth when he denied committing the murder.
Procedural History
The trial court excluded the deception test evidence, and Frye was convicted. Frye appealed to the Court of Appeals for the District of Columbia Circuit.
Issue
Whether the results of a systolic blood pressure deception test were admissible as evidence when the underlying scientific technique had not yet gained general acceptance in the relevant scientific community.
Holding
The court affirmed the exclusion of the deception test evidence, holding that expert testimony based on a scientific technique is admissible only when the technique has gained general acceptance in the particular field to which it belongs. Because the systolic blood pressure deception test had not achieved such acceptance, it was properly excluded.
Reasoning & Analysis
The court recognized the difficulty in defining precisely when a scientific principle or discovery crosses the line between experimental and demonstrable stages. It concluded that the thing from which the deduction is made must be sufficiently established to have gained general acceptance in the particular field to which it belongs. The systolic blood pressure deception test had not yet gained such standing and scientific recognition among physiological and psychological authorities. The court found the exclusion proper because admitting unestablished scientific techniques would risk confusing or misleading the jury.
Key Quotes
“Just when a scientific principle or discovery crosses the line between the experimental and demonstrable stages is difficult to define.”
“Somewhere in this twilight zone the evidential force of the principle must be recognized, and while courts will go a long way in admitting expert testimony deduced from a well-recognized scientific principle or discovery, the thing from which the deduction is made must be sufficiently established to have gained general acceptance in the particular field in which it belongs.”
Legacy & Impact
The Frye general acceptance test became the dominant standard for admitting scientific evidence in both federal and state courts for seventy years. Its simplicity and conservative approach made it influential, though critics argued it was too rigid and slow to admit new but reliable scientific methods. While Daubert replaced Frye in federal courts in 1993, several states including California, Illinois, and New York continue to apply the Frye standard.
Exam Relevance
Frye is almost always tested in conjunction with Daubert. Exam questions often ask students to compare the two standards, identify which jurisdictions still follow Frye, and evaluate a hypothetical scientific technique under each framework. Students should also understand the policy arguments for and against each standard.
Study Tips
- 1Remember the core test: general acceptance in the relevant scientific community.
- 2Know that Frye was superseded in federal courts by Daubert but survives in several major state jurisdictions.
- 3Understand the criticisms of Frye: too conservative, slow to admit reliable new science, and potentially deferring judicial responsibility to the scientific community.
- 4Be able to articulate the advantages of Frye: simplicity, predictability, and screening out 'junk science' through community consensus.