The Peak-End Rule, Applied to Vehicle Pickup

Numa runs customer operations for 1,500+ dealerships, and its LiveCSI product scores sentiment on every service call and text. The peak-end rule suggests why a few of those moments may weigh more than the rest. People tend to remember an experience by its worst moment and its last few minutes. For a service department, that means designing two parts of the visit with extra care: the pickup, and the moments most likely to become the low point.

One of the best-known early tests of the rule is Kahneman and colleagues’ 1993 study in Psychological Science. In a lab, 32 male university students held one hand in 14°C water for 60 seconds. With the other hand, they did the same, then kept it in for 30 more seconds while the water warmed to 15°C. Asked which trial to repeat, 22 of the 32 (69%) chose the longer one: more total discomfort, with a milder ending.

Key takeaway: People judge a past experience largely by its low point and how it ended. A longer experience with a better ending can be remembered more kindly than a shorter one that ends badly.

Why Memory Keeps the Peak and the Ending

Memory keeps a summary of an experience. That summary leans hard on two moments: the most intense one and the last one.

Redelmeier and Kahneman’s 1996 study in the journal Pain tested this with real patients. The researchers recorded pain in real time for 154 people having a colonoscopy and 133 having lithotripsy, two minimally invasive procedures. Afterward, patients’ ratings of total pain tracked two things closely: the worst moment and the last three minutes.

Length barely registered. Procedures varied widely in how long they took, yet the long ones were not remembered as especially painful. Researchers call this duration neglect.

The 1993 study points the same way. Among the 21 students who felt the discomfort ease at the end of the long trial, 17 (81%) chose to repeat it. The 11 who felt little change split 6 to 5 in favor of the short trial. That pattern suggests the milder ending drove the choice.

Earlier Numa posts looked at how the number of trims and packages shapes a buying decision. Another covered how the opening moments of an F&I conversation set up everything after. The peak-end rule is the mirror image of that one: it is about how an experience ends.

What the Research Says Happens When the Ending Improves

The idea got a real-world test in a 2003 randomized trial by Redelmeier, Katz, and Kahneman, also published in Pain. It enrolled 682 colonoscopy patients. For one randomly assigned group, the scope rested in place for up to three extra minutes before removal. That gave the procedure a short, milder ending.

Those patients rated the final moments as less painful, 1.7 against 2.5 on a ten-point scale. They also rated the whole procedure as less unpleasant, 4.4 against 4.9, even though it lasted longer.

The effect on behavior was smaller. Over a median follow-up of 5.3 years, about half of all patients (50.4%) came back for a repeat colonoscopy. Before statistical adjustment, the two groups returned at 53% and 48%, a gap too small to count as significant. After the researchers adjusted for each patient’s history and findings, the longer procedure was linked to slightly higher odds of returning (an odds ratio of 1.41).

The fair reading for a dealership is modest. A better ending clearly changed how the experience was rated. It nudged return behavior only slightly, and it did so in a medical setting.

Key takeaway: In a randomized trial, a gentler ending made a longer procedure feel less unpleasant overall. The effect on return visits was small: in that trial, the ending changed the memory more than it changed whether patients came back.

Where the Peak-End Rule Holds and Where It May Weaken

A 2022 meta-analysis by Alaybek and colleagues in Organizational Behavior and Human Decision Processes pooled 174 effect sizes from peak-end studies. It found strong support for the rule and a large effect on how people rate an experience afterward. The effect of duration was essentially nil.

The same paper also sets a limit. The peak and the end predicted overall ratings about as well as the plain average of every moment. So the peak and the end carry heavy weight, and the rest of the visit still counts.

The rule may hold less well for long experiences with many parts. Kemp, Burt, and Furneaux’s 2008 study in Memory & Cognition followed 49 students through vacations that averaged seven days. Trip length had no effect on later ratings. In the authors’ words, “The peak-end rule was not an outstandingly good predictor.”

A single service visit is short and bounded, closer to a procedure than a week away. The whole ownership relationship, spread over years and many visits, looks more like the vacation study. These studies come from labs, medical settings, and everyday life such as vacations. Applying the rule at a service counter is an inference. It is best applied to the single visit.

Why Vehicle Pickup Is the Ending That Counts

Dealership satisfaction data gives the pickup real weight. J.D. Power’s 2026 U.S. Customer Service Index (CSI) Study surveyed 51,228 owners and lessees of 1- to 3-year-old vehicles. It ranks five factors in service satisfaction. Vehicle pickup is second, behind only service quality.

Quality still comes first, and it should. J.D. Power’s 2025 CSI study found that 12% of repairs were not completed correctly on the first visit. Among those customers, only 50% said they returned or planned to return to the dealership.

J.D. Power’s 2026 release also names top key performance indicators (KPIs) that dealerships could deliver more consistently. Examples include keeping customers informed of service status and explaining the work performed. Only 26% of customers said they experienced nine or 10 of the top KPIs. When all 10 were met, average satisfaction was 979. When only three were met, it fell to 632.

High satisfaction comes with strong return intent. When overall satisfaction reaches 950 or higher, 86% of mass-market customers and 88% of premium customers say they “definitely will” return for paid service. That figure describes overall satisfaction with the whole visit. The release gives no return figure for pickup on its own.

Cox Automotive’s 2025 Service Industry Study shows what tends to go wrong. In its survey of 1,974 owners, 45% had a frustration at the dealership. Among that group, the top complaint was that service took longer than expected (24%). In the same group, 12% said the final price was higher than the estimate. Customers whose visit beat expectations pointed to speed and communication.

Both frustrations can land at the end of the visit. A long wait can still be on the customer’s mind at pickup, and a price above the estimate appears on the final invoice.

Numa perspective: LiveCSI brings real-time customer sentiment monitoring to every call and text, so a service manager can spot a frustrated customer before pickup. Service Advisor Agent writes the reply, surfaces the full history, and chases the follow-up. Smart Inbox connects the dealership’s communications in one place, so the advisor at the counter sees the whole conversation.

What a Service Department Should Do Differently

Design the call about extra work. It can become the low point of the visit. In the Cox study, 13% of customers with a frustration said the dealership tried to push additional services, and 13% named finding out how much it charges. Give the advisor a clear way to explain what was found, why it matters, and what it costs. Then put the new total in writing before the work starts, so the invoice matches what the customer approved.

Close the status gap. J.D. Power’s 2025 study counts four communication behaviors among its 10 most influential KPIs, including keeping the customer informed of service status. Send a status update at each real change on the repair order, and send word early when a job will run long. An early update turns a delay into information the customer can plan around.

Design the ending itself. Have the car, the paperwork, and the advisor ready when the customer arrives. Walk through the work performed in plain words, with the invoice in hand.

Extend the ending with a follow-up. The same 2025 J.D. Power study lists contacting the customer after service to ensure satisfaction among its top 10 KPIs. A next-day text asking how the car is running adds one more good moment. It also reaches the customer who would otherwise leave quietly, the pattern behind a loyal customer’s silence becoming the warning sign.

The Bottom Line: Customers Keep the Ending, So Design It

Lab and medical research shows that people weigh an experience heavily by its low point and its final minutes, and the rule fits a single visit best.

J.D. Power’s 2026 study ranks vehicle pickup second among the factors in service satisfaction. Cox lists long waits and prices above the estimate among the top frustrations. A service department can put its extra effort where memory forms: the extra-work call, the status gap, and the pickup itself. Numa helps by showing which customers are frustrated before they reach the counter. The last few minutes are the part of the visit the customer drives away with.

Frequently Asked Questions

What is the peak-end rule?

The peak-end rule is the finding that people judge a past experience largely by its most intense moment and its ending. In a 1993 lab study, 22 of 32 participants (69%) chose to repeat a longer cold-water trial that ended less painfully. A 2022 meta-analysis of 174 effect sizes found strong support for the rule.

Does the peak-end rule apply to car dealership service?

The peak-end studies come from labs, medical settings, and everyday life such as vacations, so applying the rule to a dealership is an inference. The evidence fits a single, bounded experience like one service visit. In one study of week-long vacations, the authors found the rule “was not an outstandingly good predictor,” and years of vehicle ownership look more like that case.

Why does vehicle pickup matter for service satisfaction?

J.D. Power’s 2026 U.S. Customer Service Index Study ranks vehicle pickup second of five factors in dealership service satisfaction, behind only service quality. J.D. Power also points to explaining the work performed as a top KPI that dealerships could deliver more consistently. Pickup is a natural moment to deliver that explanation.

Which moments tend to become the low point of a service visit?

In Cox Automotive’s 2025 Service Industry Study, 45% of owners had a frustration at the dealership. Among them, 24% said service took longer than expected and 12% said the final price was higher than the estimate. Those frustrations can start with the call about extra work or a long gap without an update.

How can a service department improve the end of a visit?

Explain the work performed in plain words, and make sure the invoice matches the approved estimate. Keep the customer informed while the car is in the shop, so the pickup holds no surprises. A follow-up contact after the visit, which J.D. Power’s 2025 study lists among its 10 most influential KPIs, adds one more good moment.

See how Numa shows a service manager which customers are frustrated before pickup.