Laws of Perception · cognitive-bias
Serial Position Effect
Playable Play this law (~3 min)or keep reading below ↓
People remember the first and last items in a series best, and the middle worst. That U-shaped curve — primacy at the start, recency at the end — is why the most important navigation items belong at the two ends of a menu, and why the last thing a flow says lingers longest.
Where it comes from
The effect comes from Hermann Ebbinghaus, the German psychologist who in the 1880s ran the first rigorous experiments on memory — famously memorising long lists of nonsense syllables on himself. He found recall depended on position: the first items had time to rehearse into long-term memory (primacy) and the last were still fresh in short-term memory (recency), leaving a dip in the middle. The same curve shapes how users remember any ordered interface.
Origin: Ebbinghaus's 1880s memory-and-recall experiments
In the wild
- Navigation bars
Key actions (home/logo at the start, account/cart at the end) sit where recall is strongest; secondary items go in the soft middle.
- Onboarding
The opening promise and the closing call-to-action are remembered far more than the middle steps.
- Menus & lists
Put must-see options first and last; the items buried in the middle are the ones users forget.
Further reading
Don't just read it — feel it.
Play the 3-minute game and let your own reactions prove the law.
Play the lesson