memory

You forget the length of a painful experience entirely.

In a 1996 study, patients expressed a higher willingness to return for a repeat procedure if the duration was extended but the end was less painful.

The research was published in 1996 by Redelmeier and Kahneman in the journal Pain, rather than in 1993.

You judge an entire event by its worst and last moments.

Where this comes from

Study: Redelmeier and Kahneman (1996), Pain
What the check found: The core findings (the peak-end rule) are accurate, but the date is incorrect. The study was published in 1996.
Confidence: Solid, with limits

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