Tap MATCH (or Space) if it matches two-back. Otherwise wait. About 24 letters after a short warm-up.
How it works
Tap MATCH (or Space) if it matches two-back. Otherwise wait. About 24 letters after a short warm-up. N-back tasks in papers specify n, timing and scoring. This letter-2-back original is not a working-memory IQ.
🔁 N-Back Test (Working Memory Updating)2️⃣ Visual 2-Back Lite — Letter Identity🧩 Dual N-Back Lite — Letter + Position🔠 Letter Span Lite — Forward A–Z
❓ FAQ
Same as n-back or visual 2-back?Those URLs exist. This page is letters, n=2, original list.
Does training this raise IQ?Near transfer to this toy is expected. Far transfer to IQ is not a claim we make.
Is Space required?Click also works. Input method is another reason scores are not clinical.
📅 Last updated: 2026-08-27 · ✔ Reviewed by the All-Lifes editorial team · About · Methodology