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Verbal working memory

Digit Span — Forward & Backward

A classic verbal-memory task. Listen to a sequence of digits at a chosen rate, then type them back in order (or in reverse).

What makes this one different

Most online digit-span tools use a fixed presentation rate (~1/sec). We let you slow it down to 600 ms/digit or speed it up to 1500 ms — because the rate matters for older adults, hearing processing, and language learners.

Press Start, listen, then type the digits
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Best spans

Forward (best today)
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Backward (best today)
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History

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What problem does it solve?

Verbal working memory — the part that holds digit sequences, instructions, and verbal information active in mind — is measured most commonly with the digit span task. It's one of the few cognitive measures that has held clinical significance for over a century.

Who is this for

How to interpret your results

Forward span of 7 is typical for adults; 8–9 is strong.

Backward span is normally 1–2 lower than forward. A very large gap (5+) may indicate less flexible working memory; a small gap is healthy.

Limitations

  • Audio quality varies. We fall back to visual display if speech synthesis fails.
  • Speech synthesis voices vary across browsers and OS. Some users may find the voice hard to distinguish (1 vs 7).
  • This is recreational. Clinical digit-span testing uses standardized recordings and examiner protocols.

FAQ

Why is the rate adjustable?

For older adults or people with hearing processing differences, a slower rate makes the task fairer. For cognitive athletes, a faster rate is more demanding.

What if my voice keeps pronouncing "7" oddly?

Set your browser/OS to a clearer voice (in Settings → Accessibility → Speech). We display the digits visually too, so the task is always recoverable.

How do I use Digit Span — Forward & Backward step by step without mistakes?Follow the order given in the usage section: Listen to growing digit sequences and recall them forward or backward. With adjustable audio presentation rate and serial-position scoring. The step-by-step part matters less than the unit check that sits inside it. Confirm every unit matches the thing you are actually trying to measure before you press calculate - that single check catches more wrong answers than any other habit, and it costs about ten seconds.
What are the common mistakes when using Digit Span — Forward & Backward?Most common mistakes come down to four habits: entering 20 when the field expects 0.2 because the field is a percentage; leaving a field blank and accepting the default without checking what it stands for; changing one input and reading a result that was calculated before the change; and quoting the output as an exact figure when the page describes it as a reference estimate. Press calculate again after any edit, and treat the number as a reference point rather than a final answer.
How do I read the result from Digit Span — Forward & Backward?Read the final figure first, then come back to this section for the conditions behind it: Forward span of 7 is typical for adults; 8–9 is strong. Backward span is normally 1–2 lower than forward. A very large gap (5+) may indicate less flexible working memory; a small gap is healthy. Keep two things apart: the number itself, which comes from the values you typed, and the assumptions it depends on, which decide whether that number is meaningful. The page sets out what a higher or lower result means for your case, so check that direction as well as the magnitude.
Can I act on the Digit Span — Forward & Backward result directly?Treat it as one reference sheet before you decide, rather than as the answer itself: Audio quality varies. We fall back to visual display if speech synthesis fails. Speech synthesis voices vary across browsers and OS. Some users may find the voice hard to distinguish (1 vs 7). This is recreational. Clinical digit-span testing uses standardized The output describes a magnitude under the conditions you entered. It does not include what it actually costs to act, what might change while you act, or how the other side behaves. Before you commit, compare the result against reality and note which assumptions do not hold where you are.