Serial Position Effect
Also known as Primacy and recency effect
People best remember the first and last items in a series and tend to forget the ones in the middle.
See it in action
The same screen without and with Serial Position Effect. Watch both sides play out, then compare the outcome.
Middle items are remembered least, and that's exactly where “Search” sits.
The most important items take the first and last slots, where recall is strongest.
What to watch: the U-shaped recall curve — ends remembered, middle forgotten.
Put the most important items at the start and end of lists, menus and onboarding.
Bury critical actions or information in the middle of a long sequence.
Key takeaways
- Place the most important items at the start and end of lists and navigation.
- Don't bury key options in the middle of long menus.
- Front-load the key message and close with the call to action.
Quick facts
- Also known as
- Primacy and recency effect
- Described by
- Hermann Ebbinghaus
- Year
- 1885
- Category
- Memory & attention
- Related laws
- Peak-End Rule, Von Restorff Effect, Miller's Law, F-Shaped Pattern
Serial Position Effect explained
The serial position effect describes how people tend to remember the first and last items in a series best, and the middle items worst. The first-item advantage is the primacy effect; the last-item advantage is the recency effect.
Primacy happens because early items get more rehearsal and enter long-term memory; recency happens because the last items are still in working memory. Middle items get neither advantage.
In interfaces, this affects navigation menus, lists, onboarding sequences, feature lists and presentations: what comes first and last gets disproportionate attention and recall.
Where it comes from
First described by Hermann Ebbinghaus in his 1885 memory experiments and measured systematically by Bennet Murdock in 1962, who plotted the U-shaped recall curve of the primacy and recency effects.
How it shows up in apps
Bottom tab bars, feature lists and onboarding screens all present items in sequence; the middle positions get the least attention and recall.
Serial Position Effect examples
A bottom navigation bar places Home first and Profile last, with less-used destinations in between, matching how users remember and reach for them.
Navigation placement
Many mobile apps put the most important tabs, such as Home and Profile, at the far left and far right of the bottom bar, where they are easiest to find and remember.
Feature lists
Landing pages lead with their strongest benefit and end with a compelling one, rather than burying key value in the middle of a long list.
Onboarding sequences
The first and last onboarding screens are the ones users remember, so they should carry the main value proposition and the call to action.
How to apply Serial Position Effect
- Put the most important items at the beginning and end of lists and menus.
- Lead with the key message and close with the call to action.
- Keep lists short so fewer items fall into the forgettable middle.
- Use visual emphasis to lift important middle items.
- Order content by importance rather than by internal logic.
Want Serial Position Effect checked in your own product? Our saas ux audit evaluates it alongside the other principles that shape how users decide, onboard and stay.
Common mistakes
- Placing critical information in the middle of long lists or tours.
- Ordering navigation alphabetically or by creation date rather than importance.
- Ending journeys with low-value content, such as legal text, instead of a clear next step.
How to measure it
Test recall by asking users which items they remember after viewing a list or tour. Click-through rates by position in menus and lists show how position affects engagement.
Frequently asked questions
What is Serial Position Effect?
People best remember the first and last items in a series and tend to forget the ones in the middle.
Where does Serial Position Effect come from?
First described by Hermann Ebbinghaus in his 1885 memory experiments and measured systematically by Bennet Murdock in 1962, who plotted the U-shaped recall curve of the primacy and recency effects.
How does Serial Position Effect apply to app design?
Bottom tab bars, feature lists and onboarding screens all present items in sequence; the middle positions get the least attention and recall.
Who discovered the serial position effect?
Hermann Ebbinghaus first observed it in his 19th-century memory experiments, and Bennet Murdock documented the U-shaped recall curve in 1962.
What is the difference between primacy and recency?
Primacy is the tendency to remember the first items best, and recency the tendency to remember the last items best.
How do you measure Serial Position Effect in a product?
Test recall by asking users which items they remember after viewing a list or tour. Click-through rates by position in menus and lists show how position affects engagement.
Sources
- Ebbinghaus, H. (1885). Über das Gedächtnis. Duncker & Humblot. Find on Google Scholar ↗
- Murdock, B. B. (1962). The serial position effect of free recall. Journal of Experimental Psychology, 64(5). Find on Google Scholar ↗
Related laws
Motivation & emotionPeak-End Rule
People judge an experience mostly by how they felt at its most intense moment and at its end, not by the average of every moment.
Memory & attentionVon Restorff Effect
When several similar items are present, the one that differs from the rest is the one most likely to be noticed and remembered.
Memory & attentionMiller's Law
People can hold only a limited number of items in short-term memory — famously about seven, plus or minus two — so information should be organized into small chunks.
Memory & attentionF-Shaped Pattern
When pages lack clear structure, people scan text in an F-shape: across the top, across a little lower, then down the left side, missing much of the content.
Serial Position Effect in practice
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