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Welcome to the nexus of ethics, psychology, morality, technology, health care, and philosophy
Showing posts with label Daubert. Show all posts
Showing posts with label Daubert. Show all posts

Thursday, May 4, 2023

The Unchecked Rise of Psychological Testing Evidence in United States Courts.

King, C., & Neal, T. M. (2022, June 7).
https://doi.org/10.31234/osf.io/4hfd6

Abstract

Psychological testing, based on psychometric science, is often used in court to aid judges and juries in making legal decisions that profoundly affect people’s lives, such as eligibility for disability benefits, psychological damages, child custody, and whether and where someone will serve a criminal sentence. We provide a novel estimate of the pattern of psychological tests introduced as legal evidence throughout the entire history of United States case law, finding a sharp increase in this type of expert evidence in recent years. Although the law requires judges to screen evidence for relevance and reliability before allowing an expert to testify about it in court, legal challenges to psychological testing evidence are rare: across 28,824 judicial opinions citing psychological tests, just 479 involved a potential admissibility challenge (1.66%). This finding informs and raises questions for the public as well as legal and mental health professionals.

Discussion

Our results indicate that psychological testing evidence in U.S. courts has been increasing steadily in civil, family, and criminal cases over the past half-century, beginning roughly around the time that psychological testing emerged as a specialty in the field of psychology. Although we used a sizable sample, psychological testing evidence has undoubtedly occurred in many more cases than we could capture—with such evidence either not specified in written opinions, or judicial decisions not incorporated, for various reasons, into the large legal database we searched.

We also found evidence that legal professionals either rarely scrutinize psychological testing evidence, or admissibility decisions about such evidence are not typically deemed significant enough to warrant written explanations. This seems to be true irrespective of shifts in the strictness of admissibility standards over time. Potential challenge rates did, however, vary across individual psychological tests, and at least a third of the examined tests were challenged at least once. The two most commonly challenged types of tests provide a clue as to the type of case most likely to involve testing-related challenges: litigation concerning the civil commitment of certain convicted sex offenders. Nevertheless, the generally unchecked rise in psychological testing evidence, as suggested by this study, raises questions about the rigor of current admissibility standards, the functioning of the enforcers of those rules, and the seemingly broad deference afforded to mental health professionals’ highly varied test selections.

Monday, November 22, 2021

Revisiting Daubert: Judicial Gatekeeping and Expert Ethics in Court

Young, G., Goodman-Delahunty, J.
Psychol. Inj. and Law (2021). 
https://doi.org/10.1007/s12207-021-09428-8

Abstract

This article calls for pragmatic modifications to legal practices for the admissibility of scientific evidence, including forensic psychological science. We submit that Daubert v. Merrell Dow Pharmaceuticals, Inc. (1993) and the other two cases in the U.S. Supreme Court trilogy on expert evidence have largely failed to accomplish their gatekeeping goals to assure the reliability of scientific evidence admitted in court. Reliability refers to validity in psychological terms. Part of the problem with Daubert’s application in court is the gatekeeping function that it ascribes to judges. Most Daubert admissibility challenges are rejected by judges, who might lack the requisite scientific expertise to make informed decisions; educating judges on science might not be an adequate solution. Like others who have put forth the idea, pursuant to Federal Rule of Evidence (FRE) 706, we suggest that court-appointed impartial experts can help judges to adjudicate competing claims on admissibility. We further recommend that an expert witness ethics code sworn to in legal proceedings should be mandatory in all jurisdictions. The journal Psychological Injury and Law calls for comments and further recommendations on modifying Daubert admissibility challenges and procedures in civil and criminal cases to develop best practices to mitigate adversarial allegiance and other unconscious biases in expert decision-making.

Advantages of an Expert Witness Ethics Code Sworn to in Legal Proceedings

We suggest that in the field of psychological injury, jurisdictions in which courts reinforce expert obligations via an ethics code for expert witnesses will lead to more balanced and impartial testimony. The essential principle guiding a science-based expert witness ethics code sworn to in legal proceedings is that the process of forensic assessment, as well as the subsequent proffer of testimony in court based on those assessments, should account for all the reliable evidence gathered in a particular case as determined by methodologies informed by scientific research in the relevant field.  This recommendation is in line with psychological research showing that expert bias is reduced when experts do not focus on a single question or hypothesis, but address a “line up” of competing and alternative conclusions and hypotheses (Dror, 2020). The components of the expert witness oath, like the appointment of a court-appointed expert, encourage experts to adopt a differential diagnosis approach, in which all different conclusions and their probability are presented, rather than one conclusion (Dror, 2020). Opinions, interpretations, and conclusions based on the data, information, and evidence will more likely be impartial, fully scientifically informed, and just.

Thursday, January 8, 2015

Framed by forensics

Junky, out-of-date science fuels jury errors and tragic miscarriages of justice. How can we throw it out of court?

By Douglas Starr
Aeon Magazine
Originally published

Here is an excerpt:

Rivera’s case represents a tragic miscarriage of justice. Seen another way, it’s also the result of bad science and anti-scientific thinking – from the police’s coercive interview of a vulnerable person, to the jury’s acceptance of a false confession over physical evidence, including DNA.

Unfortunately, Rivera’s case is not unique. Hundreds of innocent people have been convicted by bad science, permitting an equal number of perpetrators to go free. It’s impossible to know how often this happens, but the growing number of DNA-related exonerations points to false convictions as the collateral damage of our legal system. Part of the problem involves faulty forensics: contrary to what we might see in the CSI drama shows on TV, few forensic labs are state-of-the-art, and they don’t always use scientific techniques. According to the US National Academy of Sciences, none of the traditional forensic techniques, such as hair comparison, bite-mark analysis or ballistics analysis, qualifies as rigorous, reproducible science. But it’s not just forensics: bad science is marbled throughout our legal system, from the way police interrogate suspects to the decisions judges make on whether to admit certain evidence in court.

The entire article is here.

Saturday, June 14, 2014

Psychological Science's Replicability Crisis and What It Means for Science in the Courtroom

By Jason Michael Chin
Journal of Psychology, Public Policy, and Law (Forthcoming)

Abstract:  
 
In response to what has been termed the “replicability crisis,” great changes are currently under way in how science is conducted and disseminated. Indeed, major journals are changing the way in which they evaluate science. Therefore, a question arises over how such change impacts law’s treatment of scientific evidence. The present standard for the admissibility of scientific evidence in federal courts asks judges to play the role of gatekeeper, determining if the proffered evidence conforms with several indicia of scientific validity. The alternative legal framework, and one still used by several state courts, requires judges to simply evaluate whether a scientific finding or practice is generally accepted within science.

This Essay suggests that as much as the replicability crisis has highlighted serious issues in the scientific process, it has should have similar implications and actionable consequences for legal practitioners and academics. In particular, generally accepted scientific practices have frequently lagged behind prescriptions for best practices, which in turn affected the way science has been reported and performed. The consequence of this phenomenon is that judicial analysis of scientific evidence will still be impacted by deficient generally accepted practices. The Essay ends with some suggestions to help ensure that legal decisions are influenced by science’s best practices.

Download the essay here.