Commitment Devices for Behavior Change
Lock your future self into good decisions before temptation arrives
Commitment Devices are deliberate constraints you place on your future self to ensure follow-through on intentions. Recognizing that your future self will face temptation, fatigue, and rationalization that your current self can clearly see through, commitment devices remove the option to deviate from your plan when the moment of truth arrives. These range from soft commitments like accountability partners and public declarations to hard commitments like financial penalties, automatic payroll deductions, or physically removing access to temptations. The behavioral science insight is that present bias makes our future self predictably weaker than our current planning self, so we must use our current clarity to constrain our future weakness. Research by Milkman and others shows that commitment devices significantly improve outcomes for everything from saving money to exercising to taking medication, precisely because they bypass the willpower bottleneck.
- Your future self will be predictably weaker than your current planning self due to present bias
- Removing options eliminates the need for willpower at the moment of temptation
- Harder commitments with real consequences are more effective than soft intentions
- The best time to create a commitment device is when you are thinking clearly, before temptation arrives
- Identify Where Willpower FailsMap the specific moments where your good intentions consistently break down. Is it at 6 AM when the alarm goes off for the gym? Is it at 3 PM when you reach for snacks? Is it on Friday evening when you planned to study but friends invite you out? These are the specific decision points where commitment devices need to be deployed. The more specific you can be about the moment of failure, the more precisely you can design the device.Pro tipTrack your failures for a week before designing devices - patterns will emerge that reveal your specific vulnerability windows
- Design Escalating Commitment LevelsCreate a hierarchy of commitment devices from soft to hard. Start with accountability partners and public declarations. Escalate to financial penalties using platforms like StickK or Beeminder. For maximum effect, make the penalty payable to an organization you dislike - research shows this creates stronger motivation than penalties to neutral causes. The ultimate hard commitment removes choice entirely, such as automatic payroll deductions for savings or having a gym buddy who will show up at your door.Pro tipFinancial penalties to an anti-charity (organization you disagree with) are far more motivating than penalties to causes you supportWarningStart with moderate penalties - commitments that are too harsh can lead to avoidance of the entire system rather than compliance
- Remove Friction for Good Behaviors and Add Friction for Bad OnesRedesign your environment so that the desired behavior is the path of least resistance and the undesired behavior requires effort. Sleep in your gym clothes with shoes by the bed. Delete social media apps from your phone so accessing them requires opening a browser and logging in. Move healthy food to eye level and unhealthy food to the back of a high shelf. These environmental commitment devices work by making the default choice the good choice.Pro tipThe most powerful environmental changes are ones you set up once and forget about - they work automatically without requiring daily willpower
Dean Karlan, a behavioral economist at Yale, created StickK.com where users set goals and put money on the line. If they fail to meet their commitment, verified by a designated referee, the money goes to a charity or anti-charity of their choice. Users who committed money to an anti-charity showed significantly higher goal completion rates than those without financial stakes.
The concept of commitment devices traces back to Odysseus binding himself to the mast to resist the Sirens' song, but Milkman's contribution is bringing rigorous experimental evidence to bear on when and how commitment devices work in modern contexts. Her research at the Wharton School demonstrated that people who set up commitment devices for gym attendance maintained higher attendance rates over months compared to those relying on motivation alone. The key finding was that the most effective devices combined financial penalties with social accountability.