The Epistemic Role of Diversity in Juries: An Agent-Based Model

Journal of Empirical Legal Studies, 2009

Diversity on the jury promotes the perceived fairness of the jury system. Analyzing the jury selection and composition in 277 civil jury trials, we examine how the jury selection process and jury size, two contested features of the jury system, affect diversity. We show that while peremptory challenges were systematically related to juror race/ethnicity, the opposing challenges cancelled each other out, producing no overall effect on the makeup of the jury. In contrast, jury size had a substantial effect on minority representation. We conclude that diversity is most effectively promoted by restoring the 12-member jury.

Logic, Argumentation & Reasoning, 2016

We raise the question whether there is a rigorous argument favoring one jury system over another. We provide a Bayesian model of deliberating juries that allows for computer simulation for the purpose of studying the effect of jury size and required majority on the quality of jury decision making. We introduce the idea of jury value (J-value), a kind of epistemic value which takes into account the unique characteristics and asymmetries involved in jury voting. Our computer simulations indicate that requiring more than a >50% majority should be avoided. Moreover, while it is in principle always better to have a larger jury, given a >50% required majority, the value of having more than 12-15 jurors is likely to be negligible. Finally, we provide a formula for calculating the optimal jury size given the cost, economic or otherwise, of adding another juror.

The relationship between race and jury decision making is a controversial topic that has received increased attention in recent years. While public and media discourse has focused on anecdotal evidence in the form of high-profile cases, legal researchers have considered a wide range of empirical questions including: To what extent does the race of a defendant affect the verdict tendencies of juries? Is this influence of race comparable for jurors of different races? In what ways does a jury's racial composition affect its verdict and deliberations? The present review examines both experimental and archival investigations of these issues. Though the extant literature is not always consistent and has devoted too little attention to the psychological mechanisms underlying the influence of race, this body of research clearly demonstrates that race has the potential to impact trial outcomes. This is a conclusion with important practical as well as theoretical implications when it comes to ongoing debates regarding jury representativeness, how to optimize jury performance, jury nullification and racial disparities in the administration of capital punishment.

Va. J. Soc. Pol'y & L., 1994

SSRN Electronic Journal, 1999

2017

Does it matter that almost all juries in England and Wales are all-White? Does itDoes it matter that almost all juries in England and Wales are all-White? Does it matter, even if this result is the unintended and undesired result of otherwise acceptable ways of choosing juries? Finally, does it matter that almost all juries are all-White if this has no adverse effect on the treatment of non-White defendants and victims of crime? According to Cheryl Thomas, there is no injustice in a system of jury selection, which predictably results in juries with no minority members, so long as this result is not deliberate and does not adversely affect the treatment of minority defendants and victims of crime. My view is different. In and of itself, I believe, something is wrong with a system of jury selection that predictably results in all-White juries in a diverse society, such as our own. Absent reason to believe that we lack a better alternative to current modes of jury selection, a commitme...

1998

One of the main and ongoing problems plaguing the American jury system has been ensuring that juries in civil and criminal trials are truly representative of the communities in which they serve. Historically, minorities have been disproportionately excluded from jury service. This shortfall results from a combination of factors at each stage of the juror identification process. At the jury pool stage, juror notification methods often fail to identify or reach minorities for tie simple reason that minorities generally are poorer and more transient. At the venire stage, those minorities who actually receive notification report to the courthouse at a lower rate than the majority because they ignore the summons and claim hardship more often. Finally, at the petit jury stage, prosecutors and other litigants typically eliminate most if not all, minority venirepersons through the use of both peremptory and for cause strikes. Authors Edward Adams and Christian Lane take on this problem of u...

Underlying scholarly interest in diversity is the premise that a representative body contributes to robust decision-making processes. Using an innovative measure of opinion content, we examine this premise by analyzing deliberative outputs in the US courts of appeals 1997–2002. While the presence of a single female or minority did not affect the attention to issues in the majority opinion, panels composed of a majority of women or minorities produced opinions with significantly more points of law compared to panels with three Caucasian males.

Psychonomic bulletin & review, 2010

Despite much psychological research regarding jury decision making, surprisingly little is known about the deliberation process that gives rise to jury verdicts. We review classic jury decision-making research regarding the importance of deliberation and more recent research, investigating deliberation and hung juries, that challenges the view that deliberation does not have an important impact on verdicts. We advocate greater attention to potential cognitive processes during deliberation that might explain the transition between predeliberation preferences and a jury's ultimate verdict. We then review cognitive work in the group context generally, and the jury context specifically, illustrating the promise of a cognitive perspective on jury deliberation. Finally, we identify cognitive phenomena likely to be particularly valuable in illuminating deliberation behavior.

Does it matter that almost all juries in England and Wales are all-White? Does it matter, even if this result is the unintended and undesired result of otherwise acceptable ways of choosing juries? Finally, does it matter that almost all juries are all-White if this has no adverse effect on the treatment of non-White defendants and victims of crime? According to Cheryl Thomas, there is no injustice in a system of jury selection, which predictably results in juries with no minority members, so long as this result is not deliberate and does not adversely affect the treatment of minority defendants and victims of crime. My view is different. In and of itself, I believe, something is wrong with a system of jury selection that predictably results in all-White juries in a diverse society, such as our own. Absent reason to believe that we lack a better alternative to current modes of jury selection, a commitment to democratic government and to the equality of citizens – or so I will argue – condemns existing arrangements as unjust, whether or not they have adverse effects on jury decisions, or on the ways in which our society approaches issues of race and crime.