Small cash rewards boost college students’ sleep and modestly raise their grades

Researchers at the University of Pittsburgh reported that offering a modest $5 reward for each night of at least seven hours of sleep increased adequate sleep by a quarter of nights among 468 participants, compared with 380 peers who received no money. The study involved over 1,100 undergraduates wearing Fitbit devices that recorded sleep and delivered bedtime prompts. Paid students averaged 19 extra minutes of sleep per school night and saw their semester GPA rise by roughly 0.08 points, especially among first-year freshmen.

After the four-week incentive ended, sleep duration remained about eight minutes higher for another month, though GPA gains faded after two semesters. Plain reminders without payment produced only marginal improvements, suggesting immediate financial incentives are more effective than information alone.