Can you remember 7 digits while reading a quote?
A brutal dual-task cognitive challenge benchmarked against WAIS-IV norms. Free, open source, no signup.
- A string of digits appears on screen
- A famous quote appears simultaneously — you must read it
- After the quote disappears, type back the digits from memory
- Each round, the digit string grows by one
- Miss once — game over
The dual task (reading + memorizing) simulates real working memory load, not just rote repetition.
Standard digit span tests (like the WAIS-IV subtest) measure working memory capacity in isolation. This version adds a distractor task — reading a quote — forcing genuine cognitive resource allocation.
| Score | Benchmark |
|---|---|
| 4–5 digits | Below average |
| 5–7 digits | Average (Miller's Law: "7 ± 2") |
| 7–9 digits | Above average |
| 9+ digits | Extremely rare |
Research reference: Miller, G.A. (1956). "The Magical Number Seven, Plus or Minus Two"
- Dual task design — digits + reading quote simultaneously
- Adaptive difficulty — digit length grows each round
- WAIS-IV benchmarking — instant feedback on where you stand
- Hall of Fame — global leaderboard for top scores
- No login, no ads — 100% free
- Single HTML file — zero dependencies, works offline
git clone https://github.com/daligao/working-memory-test
cd working-memory-test
open index.html # or just double-clickNo build step. No npm install. Pure HTML/CSS/JS.
Note: The Hall of Fame leaderboard requires a server with PHP. For local use, it simply won't submit scores — the core game works fully offline.
- Mind Traps Quiz — Test if you apply cognitive biases in real decisions, not just recognize them
MIT — use it, fork it, build on it.