Independent scientific research by trial and appellate judges

Why would a judge turn down an opportunity to learn more? A begins with objections to trial judges doing their own scientific research. The first objection concerns the judge's role. In an adversarial trial, the parties present evidence and arguments, and the judge decides between them. A judge who starts investigating independently might take over work that belongs to the parties or give the judge's own discoveries too much weight.

The second objection concerns competence. Being trained in law does not necessarily make someone skilled at assessing scientific research. A judge might rely on an unusual or discredited source without recognizing its problems. These are different concerns: one asks whether the judge should take that role, and the other asks whether the judge can perform it well.

The author accepts that both concerns have merit, but rejects an absolute prohibition. The next paragraphs explain why independent research can still be useful and how the trial can limit its risks. That is qualified support, not a claim that judges should freely replace the evidence with whatever they find.

First, the parties choose and pay their own experts, so the judge can end up hearing confident but conflicting accounts. One side's expert says one thing; the other side's expert says another. Independent research might help the judge evaluate that conflict. A also emphasizes that scientific facts extend beyond the particular dispute. A mistaken decision about admissibility can affect later cases, so the consequences of an error may reach well beyond the people currently in court.

Second, research at trial does not occur in a vacuum. The parties' evidence frames the debate, and the research supplements that presentation. The judge is not supposed to abandon the case the parties have presented and substitute an entirely different investigation. The author treats that structure as a safeguard against outlandish conclusions, not a guarantee that research can never go wrong.

Main point of A: Trial judges should be allowed to supplement the parties' evidence with independent scientific research, guided by the trial's structure, rather than face an absolute ban.

B changes the setting. Its first sentence sets aside what trial courts may do and argues that appellate courts should resist independent research. Do not turn this into a simple yes-versus-no disagreement about the same judges. A addresses trials; B addresses appeals and expressly withholds a position on trial judges' research.

Why does that distinction matter? At trial, experts can testify and opposing lawyers can question them. A scientific article may leave things unexplained, but a practicing expert can be asked about its methods, meaning, or reliability. The trial judge can ask questions too. B values this live testing of specialized information, especially through cross-examination.

Now imagine an appellate court finding a scientific article that was never considered at trial. It does not have the same opportunity to bring the material before live experts and have the parties test it through questioning. The concern is not merely that the judges found something new. It is that they may use their own reading of that material without the safeguards that could expose a misunderstanding.

That also creates a problem with the court's role. An appellate court is supposed to review a record, not replace the trial court's fact-finding with its own questionable research. Internet sources attract particular concern, but the objection is broader than the internet. An outside-the-record text can escape live scrutiny whether it is found online or in print.

Main point of B: Appellate courts should avoid independent scientific research outside the trial record because it bypasses live testing of evidence and takes over the trial court's fact-finding role.

The authors give different recommendations for different settings, but both care about keeping research tied to the parties' evidence and the trial process. A permits a supplement within that framework; B objects to appellate research that substitutes for it.