Watch the stream. At the beep-style prompt, type the last three digits in order. Several short streams.
How it works
Watch the stream. At the beep-style prompt, type the last three digits in order. Several short streams. Running span in labs has list lengths and scoring rules. This original stream is not a working-memory IQ.
🏃 Running Span Lite — Last Three Digits🧾 Digit Span Test — Forward & Backward➕ Paced Addition Lite — Add the Last Two📌 Keep-Track Lite — Last Item Per Category
❓ FAQ
Same as running-span lite?Related updating family, different URL (here: digits only, last three).
Is last-three my capacity k?No. A web stream is not a Cowan-k estimate.
Does a miss mean low IQ?No. Attention and lag on a phone are not a composite.
📅 Last updated: 2026-08-27 · ✔ Reviewed by the All-Lifes editorial team · About · Methodology