How Juries Work

In most common law countries and some civil law ones, criminal verdicts are reached by juries: groups of ordinary citizens who deliberate together. They are expected to decide in ways that serve legal goals such as accuracy and fairness. Rebecca K. Helm argues that the jury, while important as a symbol, is not necessarily well built for a modern society that wants procedures designed with evidence and tested against those goals.

Helm sets out new models of how individual jurors and whole juries work in practice. These draw on psychological theory and empirical research, and they give a framework for making sense of the large existing body of work on jury decision-making. Using that framework, she identifies where the jury performs well and where it falls short as a finder of fact, and shows how trial procedure can reduce the weaknesses and build on the strengths.

The book closes with evidence-based proposals for changing the procedures around trial by jury, aimed at improving the administration of justice wherever juries hear criminal cases. Throughout, it combines legal and psychological research into a broad assessment of the modern criminal jury and of how research can improve its performance.