Source: https://www.accidentlawyerhawaii.com/defective-products-liability/daubert-and-expert-testimony.html
Timestamp: 2019-04-24 04:13:32+00:00

Document:
Daubert v. Merrell Dow Pharmaceuticals Inc., 509 U.S. 579 (1993) constituted a major shift in the treatment of expert testimony in Federal Court cases. Prior to Daubert, courts and commentators regarded Frye v. United States, 293 F. 1013 (D.C. Cir. 1923) as the pre-eminent case on the admission of expert testimony. The Frye standard of "general acceptance" within the scientific community was modified by the Federal Rules of Evidence (and in particular, Rule 702) and ultimately Daubert found that Rule 702 of the Federal Rules of Evidence (as interpreted in Daubert) completely displaced the Frye test. This occurred in 1993.
"In determining whether a proffer of scientific evidence is sufficiently reliable, we have previously held that '[o]ne very significant fact to be considered is whether the experts are proposing to testify about matters growing naturally and directly out of research they have conducted independent of the litigation, or whether they have developed their opinions expressly for purposes of testifying.' Daubert v. Merrell Dow Pharms, Inc., 43 F.3d 1311, 1317 (9th Cir.1995)('Daubert II'). If the testimony is not based on independent research then what is required is 'proof that the research and analysis supporting the proffered conclusions have been subjected to normal scientific scrutiny through peer review and publication.' Id. at 1318.
"We note at the outset that neither of Daubert II's two primary criteria for establishing the reliability of expert testimony is met in this case. Dr. Elston's research was not 'conducted independent of the litigation.' Id. at 1317. Rather, his opinion was developed 'expressly for purposes of testifying.' Id. Nor was that research 'subjected to normal scientific scrutiny through peer review and publication.' Id. at 1318. This does not mean, however, that his testimony was improperly admitted; a proffer of scientific testimony may still be deemed reliable enough to be admitted if neither of these two criteria is met. We recognized in Daubert II that '[t]here may well be good reasons why a scientific study has not been published. For example, it may be too recent or of insufficiently broad interest.' Id. at 1318 n. 9. Where peer review and publication are absent, 'the experts must explain precisely how they went about reaching their conclusions and point to some objective source--a learned treatise, the policy statement of a professional association, a published article in a reputable scientific journal or the like--to show that they have followed the scientific evidence method, as it is practiced by (at least) a recognized minority of scientists in their field.' Id. at 1319. Daubert v. Merrell Dow Pharm., Inc., 509 U.S. 579 (1993)"
"In Khumo Tire Co. v. Charmichael, 526 U.S. 137 (1999), when evaluating the reliability of the reasoning and methodology employed by nonscientific or technical expert witnesses, the Supreme Court's main objective is to 'ensure that an expert, whether basing testimony on professional studies, a clearly established methodology or technique, or on his own specialized knowledge, skill or experience, employs in the courtroom the same level of intellectual rigor that characterize the practice of an expert in the relevant field.' Khumo, 526 U.S. at 152.
"The linchpin of the Daubert/Paoli analysis is an evaluation of the 'relevance and reliability' of the proposed expert testimony. See Daubert, 509 U.S. at 595, In re Paoli R.R. Yard PCB Litig., 35 F.3d 717, 741-743 (3d Cir. 1994) ('Paoli II') . The inquiry into reliability requires a court to ensure that an expert's opinion is 'based on the "methods and procedures of science" rather than on `subjective belief or unsupported speculation.' Paoli II, 35 F.3d at 742 (citing Daubert, 509 U.S. at 590). In other words, the court must satisfy itself that the expert has 'good grounds' for his or her opinion. Id. The Supreme Court, and the Third Circuit, have identified several factors to assist the court in determining whether a particular expert opinion is based on valid reasoning or methodology. These factors include: (1) whether a method consists of a testable hypothesis; (2) whether the method has been subject to peer review; (3) the known or potential rate of error; (4) the existence and maintenance of standards controlling the technique's operation; (5) whether the method is generally accepted; (6) the relationship of the technique to methods which have been established to be reliable; (7) the qualifications of the expert witness testifying based on the methodology; and (8) the non-judicial uses to which the method has been put. Paoli II, 35 F.3d at 742 n. 8. These factors are intended to serve only as 'useful guideposts, not dispositive hurdles that a party must overcome in order to have expert testimony admitted.' Heller v. Shaw Industries, Inc., 167 F.3d 146, 152 (3d Cir. 1999); see also, Daubert, 509 U.S. at 594 (emphasizing that the inquiry into the evidentiary reliability of expert testimony under Rule 702 is intended to be a 'a flexible one' and that the list of enumerated factors is neither exclusive nor dispositive)."
"The Daubert factors may apply to the testimony of engineers and other experts who are not scientists. The Daubert 'gatekeeping' obligation applies not only to 'scientific' testimony, but to all expert testimony."
The court went on to find that other factors besides those four listed in Daubert, (see, eg., the quote from Clausen supra) may be considered by the trial judge in performing the gatekeeping function. See 119 S.Ct. at 1175.
"[T]he law grants a district court the same broad latitude when it decides how to determine reliability as it enjoys in respect to its ultimate reliability determination.; Daubert, 509 U.S. at 593, 594, 113 S.Ct. 2786 ('Many factors will bear on the inquiry, and we do not presume to set out a definitive checklist or test.'; 'The inquiry envisioned by Rule 702 is ... a flexible one.'). Along the same lines is the Court's reminder that 'the gatekeeping inquiry must be tied to the facts of a particular case.' Kumho Tire, 526 U.S. at 150, 119 S.Ct. 1167 (internal quotation marks and citations omitted)."

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