Field studies in many domains have found evidence of decision fatigue, a
phenomenon describing how decision quality can be impaired by the act of
making previous decisions. Debate remains, however, over posited
psychological mechanisms underlying decision fatigue, and the size of
effects in high-stakes settings. We examine an extensive set of pretrial
arraignments in a large, urban court system to investigate how judicial
release and bail decisions are influenced by the time an arraignment occurs.
We find that release rates decline modestly in the hours before lunch and
before dinner, and these declines persist after statistically adjusting for
an extensive set of observed covariates. However, we find no evidence that
arraignment time affects pretrial release rates in the remainder of each
decision-making session. Moreover, we find that release rates remain
unchanged after a meal break even though judges have the opportunity to
replenish their mental and physical resources by resting and eating. In a
complementary analysis, we find that the rate at which judges concur with
prosecutorial bail requests does not appear to be influenced by either
arraignment time or a meal break. Taken together, our results imply that to
the extent that decision fatigue plays a role in pretrial release judgments,
effects are small and inconsistent with previous explanations implicating
psychological depletion processes.