Oddly Wired
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memory

You remember the intensity of an experience, not duration.

The peak-end rule explains how you evaluate past events based on their most intense moment and their ending.

In a 1993 study, participants chose to extend an uncomfortable experience because the final moments were slightly less painful than the start. The brain ignores the total time spent and creates a summary based on these two specific markers.

You are recording a movie, not keeping a ledger.

Where this comes from

Study
Daniel Kahneman, 1993
What the check found
The 1993 paper 'When more pain is preferred to less: adding a better end' by Kahneman, Fredrickson, Schreiber, and Redelmeier is the definitive source for this finding.
Confidence
Well replicated

Related

One of these every day, and every one names the study it came from. When a finding is contested, it says so.