The classic memory sequence — cells flash in an order, and you have to reproduce it exactly. Each cleared round adds one more step. Sooner or later your inner voice runs out of room. That’s your span.
The Science: Adapted from the digit-span task standardized by Wechsler (1939). Working-memory span predicts reading, math, and reasoning performance better than IQ does on many tasks (Baddeley, 2000).
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