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The emotion curve on most journey maps borrows from real research. The research is narrower than the curve suggests, and it says as much about effort as about delight.
Two findings sit behind most emotion curves: people remember experiences by the most intense moment and the end, and customers reward low effort more than delight. Both are real. Both weaken when stretched across a four-month journey.
In a 1993 experiment, Daniel Kahneman, Barbara Fredrickson, Charles Schreiber and Donald Redelmeier had people hold a hand in 14°C water for 60 seconds and, in another trial, 30 seconds longer as the water warmed to 15°C. “A significant majority chose to repeat the long trial”, preferring more discomfort that ended better Published. Redelmeier and Kahneman then found that 154 colonoscopy and 133 lithotripsy patients judged total pain by the worst moment and the last three minutes, and that long procedures were not remembered as especially bad Published.
The strongest test was a randomized trial. Redelmeier, Katz and Kahneman added a short, less painful interval to the end of colonoscopies for half of 682 patients. They remembered the procedure as less unpleasant, and were slightly more likely to come back for a repeat colonoscopy over the following years: an odds ratio of 1.41, against an average return rate of 50.4% Published. That’s the result closest to what a brand cares about, a changed ending that changed a later decision, and the effect was modest.
A 2022 meta-analysis by Balca Alaybek and colleagues, pooling 174 effect sizes, found a large peak-end effect on how people rate past experiences (a correlation of 0.58) and almost no effect of duration. It also found the peak-end effect was about as strong as the simple average of the whole experience Published. So the rule holds up, but the average matters as much: you can’t fix a bad journey with a good ending.
Most of that research is on single, short episodes rated moment by moment. Stretched episodes look different. Simon Kemp, Christopher Burt and Laura Furneaux had 49 students text their happiness daily through a week-long vacation and found “the peak-end rule was not an outstandingly good predictor” of how they remembered it Published. In a call-center study, Peter Verhoef, Gerrit Antonides and Arnoud de Hoog found that average performance and positive peaks drove satisfaction, while the end of the call had an unexpected negative effect they called “difficult to explain” Published.
A DTC journey is many episodes over months. My reading: treat each detour (a delivery problem, a support contact, a return) as its own episode and make sure it ends well. Don’t draw one emotion curve over the whole journey and call it measured.
The Corporate Executive Board’s research, from more than 75,000 people who’d used phone or self-service support, argued that exceeding expectations adds little and that reducing effort is what keeps customers. Among customers who had a hard time solving a problem, 81% said they intended to speak negatively about the company Reported. The authors proposed a Customer Effort Score as a better predictor of loyalty than satisfaction or Net Promoter Score.
An independent test disagrees. Evert de Haan, Peter Verhoef and Thorsten Wiesel compared the metrics across customers of 93 firms in 18 industries: top-2-box satisfaction predicted retention best overall, the best metric differed by industry, and combining metrics beat any one Published. Measure effort where it’s obviously at risk: the detours.
Put measured points where the curve was: a one-question survey after a support contact, review stars at the first-use stage, return reasons. Add effort markers from data, such as a second contact about the same order within seven days. And make every detour end in writing: the refund confirmed, the replacement tracked, the answer sent. The Proof File covers when to ask for reviews.
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Written by Andrew Lauchner, a growth and retention operator for consumer brands. The paid work is one ninety-day Sprint.
This is one chapter of The Journey Map, which is free and readable in full on a single page with no form in front of it.