Jury nullification

The present study was conducted to determine the effects of nullification information to the jury from two sources, judge's instructions and lawyers' arguments, on juries' verdicts and decision making in three criminal cases. In addition, the research tested the impact of challenges to nullification information on trial outcomes. The results, gathered from 144 six-person juries, indicated that when juries are in receipt of nullification information from the judge or defense attorney they are more likely to acquit a sympathetic defendant and judge a dangerous defendant more harshly than when such information is not present or when challenges are made to nllification arguments. Analysis of the juries' decision-making processes suggested that nullification information may alter the way in which juries perceive and use the trial evidence. In those trials in which a nullification defense was successful, juries used the outcome of the case, as well as the intent of the defendant, to evaluate the worth and weight of the evidence. Pronullification conditions devalued the currency of the evidence and permitted juries to utilize nonevidentiary factors in deciding the cases used in this study.This research was supported by a grant from The University of Toledo Graduate School.     

Chaos in The Courtroom Reconsidered: Emotional Bias and Juror Nullification

A widespread presumption in the law is that giving jurors nullification instructions would result in "chaos"-jurors guided not by law but by their emotions and personal biases. We propose a model of juror nullification that posits an interaction between the nature of the trial (viz. whether the fairness of the law is at issue), nullification instructions, and emotional biases on juror decision-making. Mock jurors considered a trial online which varied the presence a nullification instructions, whether the trial raised issues of the law's fairness (murder for profit vs. euthanasia), and emotionally biasing information (that affected jurors' liking for the victim). Only when jurors were in receipt of nullification instructions in a nullification-relevant trial were they sensitive to emotionally biasing information. Emotional biases did not affect evidence processing but did affect emotional reactions and verdicts, providing the strongest support to date for the chaos theory.