Decision theory, reasonable doubt, and the utility of erroneous acquittals

Terry Connolly

Research output: Contribution to journalArticlepeer-review

27 Scopus citations


A criminal-trial juror votes to convict or acquit a defendant in the knowledge that the vote may be in error: False convictions and false acquittals are unavoidable in human fact-finding systems. We show here that rigorous consistency relationships exist between the juror's assessments of the relative desirability of the four possible trial outcomes and his or her threshold level of "reasonable doubt." However, numerical values for "reasonable doubt" commonly obtained by direct questioning are significantly at variance with those obtained indirectly by computation from evaluations of the four possible outcomes. The disparity is, we argue, no mere methodological detail, but a potentially fundamental substantive issue which has historically been masked by the vagueness of verbal expressions of probability and utility.

Original languageEnglish (US)
Pages (from-to)101-112
Number of pages12
JournalLaw and Human Behavior
Issue number2
StatePublished - Jun 1987

ASJC Scopus subject areas

  • Arts and Humanities (miscellaneous)
  • General Psychology
  • Psychiatry and Mental health
  • Law


Dive into the research topics of 'Decision theory, reasonable doubt, and the utility of erroneous acquittals'. Together they form a unique fingerprint.

Cite this