Princeton ends 133-year proctor ban as AI cheating overwhelms honor code

Princeton’s faculty voted Monday to require instructor proctoring at all in-person exams starting July 1, dismantling an honor system that has run on student self-policing since 1893. The change reverses a rule originally adopted at student request and passed all three required approval rounds, with only one faculty member opposing it in the final vote. Proctors will observe silently and file reports to the student-run Honor Committee rather than intervene directly, and the Honor Code itself remains intact — only the faculty rules and university responsibilities documents need updating.

Generative AI on personal devices is the explicit driver. The policy proposal argues that small-device AI tools have made misconduct harder for nearby students to detect, undercutting the peer-reporting model the honor system depends on. Survey data backs the concern: in a 2025 senior survey, roughly 30 percent admitted cheating and 44.6 percent said they knew of violations they did not report, while only 0.4 percent had ever reported a peer. Anonymous tips have risen as students cite fear of online doxxing and social retaliation for naming classmates.

The move follows a narrower November change that already mandated proctoring for makeup, small-group, and accommodated exams. Administrators concede proctoring will not eliminate cheating but expect a deterrent effect and relief for students otherwise expected to monitor peers mid-exam. Proctor-to-student ratios and monitoring guidelines are still to be worked out before the fall term.