The Peak-end rule refers to when people evaluate an experience based on how they felt at its peak and at its end. Here, we see that Shawna evaluates a date with her husband based on the highlights and how it ended; she describes the rodeo as a highlight, but the overall night as a bust because of what Nathan said to her.
In characterizing how she felt about her experience based on the peak and the end, Shawna’s memory of the night is skewed.
This is something to be mindful of when categorizing our lived experiences. The next time you’re quick to say that something went terribly, ask yourself, am I only looking at the peak and the end?