The irrational hungry judge effect revisited (2023)
Claims that judges hand down harsher rulings before lunch are being re‑examined, with new simulations suggesting the famous “hungry judge” effect is largely an artifact of how cases are scheduled rather than blood sugar swings. Commenters note that easier, usually unfavorable parole decisions tend to be clustered before breaks, while more complex, often favorable cases are set when there is more time, which can mimic a hunger-driven pattern in the statistics. The exchange broadens into concerns about bias, case ordering, and the reproducibility of eye‑catching social psychology results that seem to confirm intuitive narratives.
Revisiting the “Hungry Judge” Effect
- Many commenters note the original effect size (favorable rulings dropping from ~65% to near 0% before breaks) seems implausibly huge; if true, everyday life (e.g., driving, safety‑critical work) would show obvious lunchtime chaos.
- The revisiting study is described as simulating “ideal” judges whose decisions are not affected by hunger or case order, yet similar patterns emerge once scheduling and analysis choices are modeled.
- Some are puzzled the paper says there’s no “conclusive evidence” of extraneous influences, while breaks and workday ends clearly act as time limits.
Case Ordering and Scheduling Effects
- Key critique: the original study assumed cases were in random order; later work and interviews suggest they are not.
- Non-random factors cited:
- Easier/shorter or negative decisions are packed into time-limited morning slots.
- More complex, often favorable cases are deferred to longer afternoon sessions.
- Cases grouped by prison, representation status, severity, or lawyer preferences.
- Several argue this scheduling alone can create the observed pattern without any hunger-driven irrationality.
Is Scheduling Itself a Bias?
- One camp: ordering by severity/complexity is a practical “shortest job first” strategy to reduce delays and manage witnesses, prisoners, and court logistics.
- Another camp: pre-sorting cases based on quick impressions or type can embed bias and influence outcomes, even if the judge later sees full details.
- Some note judges get immediate feedback on how cases actually unfold, which could build predictive skill; others say the feedback mostly reinforces existing norms, not “fairness.”
Psychology, Hunger, and Evolution
- Multiple commenters doubt that hunger meaningfully changes high-stakes rulings for trained professionals, at least not at the dramatic levels claimed.
- Others insist hunger clearly affects mood (“hangry”), and it’s not absurd that this could tilt marginal decisions.
- Speculation about evolutionary logic: hunger might either:
- Increase exploratory/high‑variance behavior in resource‑scarce situations, or
- Force a low‑power, simplified decision mode to conserve energy.
Thread agrees this is interesting but empirically unclear here.
Social Science, Replication, and Use in Practice
- Widespread frustration with pop‑psych results that are dramatic, media‑friendly, and later fail scrutiny.
- Calls to:
- Avoid citing single, unreplicated psychology studies as established fact.
- Treat the hungry‑judges story as a cautionary tale about overinterpreting correlations.
- Some confess they changed real behavior (e.g., avoiding pre‑lunch meetings) based on the original study and now see that as premature.