True/False (or T/F keys), remember the letter. Then tap letters in order. Four mini-sets.
How it works
True/False (or T/F keys), remember the letter. Then tap letters in order. Four mini-sets. Operation span is a published complex-span family. This lite is a short original, not a clinical IQ.
➗ Mental Math Speed Test🔠 Letter Span Lite — Forward A–Z📖 Reading Span Lite — Sense Check, Then Words🔁 N-Back Test (Working Memory Updating)
❓ FAQ
Do I need to be good at maths?The sums are small. The point is storage while deciding, not a maths contest or an IQ.
What if I miss a true/false?You still try to recall the letters. Labs sometimes drop inaccurate processing trials. We still count letter hits as a toy.
Is this dual n-back?No. OSPAN-style is processing plus serial recall. Dual n-back is updating two streams.
📅 Last updated: 2026-08-27 · ✔ Reviewed by the All-Lifes editorial team · About · Methodology