Memory and attention
Serial position effect
Order can affect recall. Choose an order that also makes the task easier to complete.
The idea in plain language
What it means.
Free-recall experiments often find different recall for items near the beginning, middle and end of a presented list. The pattern depends on the task and conditions. A navigation menu that remains visible is not the same as a word list recalled from memory, so menu order needs its own rationale.
Evidence and interpretation
What supports it.
Experimental list-memory research, including Murdock's original study and a later laboratory preprint. It does not establish universal first-and-last placement rules for visible interfaces.
From principle to interface
Where you could use it.
Proposed applications, not tested outcomes. The expected effects are hypotheses to check with realistic tasks and users.
Application 1
Introduce a short procedure
State the goal before the steps, then finish with a compact checklist the person can keep open while working.
Expected effect to test
The purpose and completion criteria remain available after the introduction.
Keep in view
External reference reduces the need to rely on recall; do not move a required step out of its logical order.
Application 2
Arrange a settings menu
Order related settings by a tested task model, then check whether people can locate infrequent settings as well as common ones.
Expected effect to test
The order supports predictable retrieval.
Keep in view
Do not place an item last solely because a memory experiment found recency effects.
Turn the idea into a check
Use it deliberately.
- Distinguish a recall task from a visible search task.
- Preserve procedural, alphabetical or categorical order when it helps retrieval.
- Measure whether people can find and use the needed item.
Where the rule gets complicated
Keep the limits attached.
- Presentation pace, delay and recall instructions affect the pattern.
- First or last placement does not guarantee attention.
- Keep essential information available rather than depending on memory effects.
A named principle does not settle an accessibility requirement, prove a conversion lift or replace testing the particular interface.
Application and implementation boundaries
What the application check shows.
The example retained an explicit Choose, Review, Confirm sequence and visible summary. No primacy, recency or recall outcome was measured.
Methods: Local application example. A completed check covers the stated sample; it is not a safety certification.
- Target
- Original IonBin synthetic interface example; no external product or human-participant study.
- Version or capture
- 2026-10-19 local fixture
- Integrity scope
- SHA-256 f85d1056afd667225a1e0364edfb8f25b4693ffa7b2b8c7d7af5b92338b85ee4 identifies the exact HTML fixture only.
Test conditions
- 155.0.8059.82 Chromium; fresh context with all network requests blocked.
- Synthetic inputs, memory-only state, reduced-motion preference, 1280px and 320px viewports.
Individual checks and observations
Persistent summary
passLocal application example: Exercise the original local application fixture and inspect the resulting controls or DOM state.
Observed: Changed input was echoed in a visible review summary.
No style order
passLocal application example: Exercise the original local application fixture and inspect the resulting controls or DOM state.
Observed: With authored CSS disabled, the named input and ordered process remained present.
Security findings and boundaries
Review of the local example’s stated interaction boundaries; no backend, authentication, production permissions or external service was exercised.
Practical advice · caution
Order cannot replace a final consequence check
Keep destination, data scope and irreversible effects available at confirmation; placing them first or last is not a safeguard by itself.
Practical caveats
- Preserve meaning in DOM reading order and let people revisit details before committing.
What remains untested
- This checks an authored application example, not the truth, effect size or generality of the named principle.
- No users, assistive-technology participants, physical devices or production task outcomes were evaluated.
Security limits
- The example has no real authorization or persistence layer; its UI behavior cannot establish the security of a deployed workflow.
Evaluation sources
- Murdock: The Serial Position Effect of Free Recall (1962)
Original study identity verified; direct publisher retrieval restricted.
- Herrema and Kahana: First Recall Costs and Benefits
Authors' laboratory preprint re-evaluating immediate free recall; indexed text reviewed and authorship checked against the lab's publication list. Peer-reviewed publication status not established.
Go to the source
Research and further reading.
- Murdock: The Serial Position Effect of Free Recall (1962)
Original study identity verified; direct publisher retrieval restricted.
- Herrema and Kahana: First Recall Costs and Benefits
Authors' laboratory preprint re-evaluating immediate free recall; indexed text reviewed and authorship checked against the lab's publication list. Peer-reviewed publication status not established.
Related questions
More on memory and attention.
Research finding
Miller's Law and working memory
Keep needed information available instead of making people hold it in memory.
Research finding
Von Restorff effect
A meaningful difference can help something stand out in memory. Make the difference worth noticing.
Research finding
Peak-end rule
How an experience ends can influence how it is remembered. Make completion useful and honest.