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People judge experiences by their peak and end moments, not averages.
stellae.design
People judge an experience based on how they felt at its most intense moment and at its end, not on the average of the entire experience. Nail the climax and the conclusion, and users will remember the whole thing fondly.
People evaluate an experience primarily based on its most emotionally intense point (the peak) and its conclusion (the end), rather than on the sum or average of every moment. A positive peak and a positive ending can redeem an otherwise mediocre experience, while a negative ending can taint an otherwise good one.
Configure the peak moment and ending quality, then experience the sequence.
Peak (step 2)
Ending (step 4)
Try different combinations: a great ending with bad peak vs bad ending with great peak. Notice how the ending disproportionately affects your rating.
Celebratory success screen after checkout
Confetti animation and warm message creating a positive ending
Plain 'Order placed' text after checkout
Anticlimactic ending that misses the opportunity for a positive peak
This cognitive bias means that user satisfaction is disproportionately influenced by specific moments rather than overall consistency. Investing in making key moments delightful — and ensuring the final interaction leaves a positive impression — is more impactful than uniformly improving every touchpoint by a small amount. It also means that a single bad ending can undo extensive good work.
When a user sends an email campaign in Mailchimp, they're greeted with an animated high-five from the mascot and a congratulatory message. This deliberate peak moment turns the stressful act of sending to thousands of people into a celebratory experience. Users remember the send experience as positive because the peak was delightful.
Disney parks are meticulously designed so that the final experience — walking down Main Street with music, lighting, and a castle view — leaves a strong positive impression. Even after long lines and crowded walkways during the day, guests leave with a positive end memory. This deliberate ending design drives return visits and positive word-of-mouth.
Some e-commerce sites present a generic error page after a user has entered their credit card details and clicked 'Purchase.' The entire shopping experience — browsing, selecting, configuring — is overshadowed by the stressful, unclear ending. Even if the user eventually completes the purchase, the negative end memory dominates their recollection.
Duolingo ends each lesson with enthusiastic celebration screens showing progress, streak counts, and encouraging messages. The peak of accomplishment combined with a positive ending motivates users to return the next day. The ending experience is carefully designed to be the emotional highlight that keeps the habit loop running.
• Teams sometimes focus exclusively on delightful peaks while ignoring painful moments that create negative peaks — a single rage-inducing bug can become the dominant memory. Others invest in flashy ending animations without addressing the substantive quality of the final interaction. The rule applies to negative peaks too, so eliminating pain points is as important as creating delightful ones.
| Check | Good Pattern | How to Test |
|---|---|---|
| Peak moment identification | You have mapped the emotional high points of your core user journeys and invested design effort in making those moments memorable. | Conduct journey mapping with real users and ask them to rate emotional intensity at each step. Verify that identified peaks align with your design investment areas. |
| Ending experience quality | The final interaction in key flows (checkout, onboarding, task completion) is polished, positive, and provides clear next steps. | Run usability tests focused on the last three screens of each major flow. Measure satisfaction ratings specifically for the conclusion and compare against mid-flow ratings. |
| Negative peak mitigation | Known pain points and frustration moments are identified and actively mitigated with clear error recovery, helpful messaging, and graceful degradation. | Review support tickets and session recordings to identify rage-click patterns and high-exit-rate screens. Prioritize fixes for the most emotionally intense negative moments. |
When consistency matters more than memorability — for example, in high-frequency utility tools like email or spreadsheets where users need reliable, predictable behavior more than emotional peaks. In these contexts, eliminating all negative moments is more valuable than engineering positive ones.
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