The Problem of Procrastination and Self-Control

One group could choose any deadline for each paper. One group had evenly spaced deadlines imposed by Ariely. One group had all three papers due at the end of the semester. The imposed-deadline group performed best. The free-choice group did better than expected — most chose deadlines spread across the semester rather than all at the end — but worse than the imposed group. The all-at-the-end group did worst.

The findings undermine the libertarian assumption that more freedom always produces better outcomes. When people are aware of their own future weakness, they sometimes choose to constrain it. Imposing the constraint externally (the imposed-deadline group) helps even more, because it removes the temptation entirely. The free-choice group sometimes constrained themselves but not optimally.

The chapter's practical takeaways: pre-commitments work, deadlines work, structural removal of options works. Willpower-based resistance does not work reliably. Ariely is honest that the willpower failure is universal — including in researchers who study the failure mode — and that the only durable response is to design the environment so that the desired behavior is the easy default. The chapter is one of the book's clearest examples of irrationality being predictable enough to engineer around.

The students with rigid, evenly spaced deadlines imposed by the instructor earned the best grades; those who set their own deadlines did worse; and those allowed to leave everything to the end did worst of all. Self-imposed deadlines helped — people do sense their own weakness and try to bind themselves — but external constraints worked better, because our preference for immediate comfort over future benefit (present bias) reliably defeats good intentions when the future arrives. Ariely generalizes to health screenings, savings, and car maintenance, where automatic schedules and bundled commitments outperform reminders that rely on willpower. His prescription is to engineer precommitment devices that take the decision away from the future self at the moment of temptation — automatic deductions, default enrollments, appointments that are costly to cancel — rather than exhorting people to try harder. Procrastination, in this account, is not a character flaw to be scolded away but a predictable bias to be designed around.