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EF Battery · 02

Digit Span

Listen to a sequence of digits and type them back. First forward, then backward. Sequences get longer until you miss two in a row. Measures working memory.

Part 1 of 2

Forward Digit Span

You'll hear a short sequence of digits, one per second.

When it stops, type them back in the same order.

Sequences get one digit longer each round until you miss two in a row.

Tip: turn your volume up. Digits are spoken by the browser.

Research prototype. Not a diagnostic device. Data stays in your browser until you choose to export it. Browser speech synthesis is used to play digits, so voice and pacing depend on your device.