Why you misjudge whether a trip was actually "good"

Ask anyone how their two-week trip was and they'll give you a single summary verdict. But that verdict is built from a strange, lopsided sample of the trip — and knowing how can change how you plan.

The peak-end rule

A landmark line of psychology research established the peak-end rule: people judge an experience not by its average or its total, but overwhelmingly by two moments — the most intense point (the “peak”) and how it ended. In studies measuring discomfort, a weighted combination of the peak moment and the final moment accounted for roughly 94% of people's overall evaluation. The long middle of an experience gets averaged out of memory.

Duration neglect

Stranger still is duration neglect: the length of an experience barely affects how it's remembered. In one striking experiment, people chose to repeat a longer painful episode over a shorter one — they accepted more total discomfort because the longer version had a gentler ending. More pain, but a better finish, made the better memory.

Apply this to a holiday and two things follow. First, your memory of a trip is dominated by its single best moment and its final day — not by its overall quality or how long it lasted. A wonderful week that ends in a missed-flight, lost-luggage airport meltdown can be filed in memory as worse than it really was, because the ending carries outsized weight. Second, a longer trip isn't remembered as proportionally better. That's oddly freeing: an extra few days in the middle does far less for your memory than you'd think.