A Stimarium Dossier
Surprise is a memory technology
In a study drawing on 17 NBA seasons, surprise was linked to better recall of the plays, games and seasons fans felt worst about, and of the plays and seasons they felt best about. Researchers estimated surprise using betting odds and play-by-play win probabilities.
What’s known, what’s not: Known, Our read, Open
Your brain notices when the world refuses to behave.
Memory researchers often use “prediction error” for an outcome that differs from what the brain expected.
In a 17-season NBA study, surprise was associated with better recall of negative plays, games and seasons, and positive plays and seasons. [S01]
A 2025 lab study found that curiosity about new information could improve later memory for that information. Surprise affected memory differently across age groups.
In a 17-season NBA study, surprise was associated with better recall of negative plays, games and seasons, and positive plays and seasons.
A feed optimized only for relevance may accidentally remove one ingredient of learning.
If every recommendation resembles the last five, the system becomes comfortable and efficient.
We think a good detour can be worth more because you did not see it coming.
Think with the idea.
Take me sideways
Museum design, magic tricks and good teaching all exploit controlled expectation violation. The reveal works because the audience first formed a model that can be broken.
Interpretive connection.Challenge it
Surprise does not automatically produce durable understanding. Noise, shock and novelty can capture attention without helping someone learn.
Important boundary condition.Trace it
Follow the connection between how expectations shape perception, how people learn from rewards, what makes them curious and what they remember of their own lives.
High-level conceptual map.Take it with you
Keep the structure legible but let the content occasionally violate expectation. Surprise works best when the user can integrate the new information afterward.
We offer this as a rule of thumb for design that will not fit every case.What’s known, what’s not
↑ Back to where you wereResearch links surprise, the gap between what you expected and what happened (researchers call it prediction error), with stronger memory in some settings. In a 17-season NBA study, surprise was associated with better recall of negative plays, games and seasons, and positive plays and seasons. A 2025 lab study found that curiosity felt in the moment, not curiosity as a trait, improved later memory, and that surprise added to this more in younger adults.
A discovery product that introduces meaningful surprise may help ideas become more memorable than a perfectly predictable feed.
Could deliberately planned surprises become a measurable tool for learning?
What the three labels meanClose explanations
Known marks what the cited evidence directly supports, including what named researchers argue.
Our read is Stimarium’s own interpretation of that evidence.
Open marks a question the cited evidence can’t answer yet, or a possibility we are raising ourselves.