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Evidence

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Certainty

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Shaken Baby Syndrome, Abusive Head Trauma, And Actual Innocence: Getting It Right, Keith A. Findley, Patrick D. Barnes, David A. Moran, Waney Squier Jan 2012

Shaken Baby Syndrome, Abusive Head Trauma, And Actual Innocence: Getting It Right, Keith A. Findley, Patrick D. Barnes, David A. Moran, Waney Squier

Articles

In the past decade, the existence of shaken baby syndrome (SBS) has been called into serious question by biomechanical studies, the medical and legal literature, and the media. As a result of these questions, SBS has been renamed abusive head trauma (AHT). This is, however, primarily a terminological shift: like SBS, AHT refers to the two-part hypothesis that one can reliably diagnose shaking or abuse from three internal findings (subdural hemorrhage, retinal hemorrhage, and encephalopathy) and that one can identify the perpetrator based on the onset of symptoms. Over the past decade, we have learned that this hypothesis fits poorly …


A Very Brief Primer On Bayesian Methods In Evidence, Richard D. Friedman Jan 2002

A Very Brief Primer On Bayesian Methods In Evidence, Richard D. Friedman

Articles

I have been asked to write an extremely short explanation of the Bayesian approach to evidentiary issues, for the benefit of those who regard themselves as probabilistically challenged. Although the application of Bayesian probability to evidence has generated a good deal of debate, its use as a heuristic device should not be particularly controversial. Evidence concerns propositions that are uncertain. Accordingly, some concept of probability must play a role. Standards of persuasion, such as "more likely than not" and "beyond a reasonable doubt" are clearly probabilistic, and the definition of relevant evidence, as expressed in Fed. R. Evid. 40 I, …


Dealing With Evidentiary Deficiency, Richard D. Friedman Jan 1997

Dealing With Evidentiary Deficiency, Richard D. Friedman

Articles

Lack of information distorts litigation. Claims or defenses that a party might prove easily, or that might even be undisputed, in a world of perfect information can be difficult or impossible to prove in the real world of imperfect information. Some information deficiencies are inevitable, at least in the sense that we could not eliminate them without incurring undue social costs. In some cases, however, a person's conduct may have caused the deficiency. More generally, the person may have had available a reasonable alternative course of conduct that would have eliminated, or at least mitigated, the deficiency. Ariel Porat and …


Towards A (Bayesian) Convergence?, Richard D. Friedman Jan 1997

Towards A (Bayesian) Convergence?, Richard D. Friedman

Articles

If I understand them correctly, several leading Bayesioskeptics (Allen, Callen, Stein) acknowledge - with varying degrees of specificity and varying degrees of grudgingness - that standard probability theory can be useful as an analytical tool in considering evidentiary doctrines and the probative value of evidentiary items.


Answering The Bayesioskeptical Challenge, Richard D. Friedman Jan 1997

Answering The Bayesioskeptical Challenge, Richard D. Friedman

Articles

In recent years, some scholars of evidence, myself among them, have made active use of subjective probability theory - what is sometimes referred to as Bayesianism - in thinking about issues and problems related to the law of evidence. But, at the same time, this use has been challenged to various degrees and in various ways by scholars to whom I shall apply the collective, if somewhat misleading, label of Bayesioskeptics. I present this brief paper to defend this use of probability theory, and to discuss what I believe is its proper role in discourse about evidentiary issues.