For example, here's a graphic charting the severity of judges' rulings against when the judges had a meal break.

Pretty dramatic! To read the original study, which looked at over 1,000 rulings by 8 Israeli judges, see Shai Danziger et al., Extraneous Factors in Judicial Decisions, 108 Proceedings Nat'l Acad. Sciences 6889-6892 (2011)