Cognitive Span Test
Letter Span
What this measures. Letter span is a classic test of short‑term (working) memory. You'll see a string of letters flash one at a time, then have to type them back. Get it right and the string grows by one letter; get it wrong and the session ends, recording the longest string you handled — your span.
Forward vs. backward. Forward span asks for the letters in the order you saw them. Backward span asks for them in reverse order, which leans harder on manipulating information in your head, not just holding it — most people score noticeably lower on it.
Set your options below, then press Begin Session. Your results and history are kept at the bottom of the page.
1Settings
Type the letters in the order shown.
4
Letters in the first sequence (2–9).
How long each letter stays on screen.
On
Excluding: I, L, O, Q, S, Z
2Test
Ready when you are
Choose your settings above, then press Begin Session.
Press Enter to submit your answer. Letters are automatically capitalized.
3Stats & results
–
Best forward span
–
Best backward span
0
Sessions played
–
Overall accuracy
Current session ladder
No session in progress yet.
Session history
| When | Mode | Start | Speed | A–Z set | Span reached | Trials |
|---|---|---|---|---|---|---|
| No sessions yet — your results will appear here. | ||||||
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