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Von Restorff effect 0:30
A 30-second explainer of Von Restorff effect, narrated over the same demo you can try yourself.
Try the interactive Von Restorff effect demo
What this video covers
When one item in a list is noticeably different from the others, it sticks in memory far better than its neighbours. Distinctiveness is a memory signal: the odd one out earns attention it didn't ask for.
You noticed, and remembered, the one that was different. That's the Von Restorff effect doing exactly what it promises.