Digit Span

What it measures

Working memory: repeat lengthening digit sequences forward, then in reverse.

Paradigm: digit-span subtests as reviewed in Wechsler-tradition literature; stimuli are generated, not reproduced.

Validity & honesty

Span tasks are practice-robust because every sequence is random, but attention and sleep strongly affect them — log conditions for interpretable trends. No population norms; scores are within-person.

Cadence: a retake every 1 day is advised. You can retake anytime — early retakes are scored normally and flagged in trend analysis.

Before you start

• · ~8 min, one sitting
• · untimed — no clock is shown

Your history

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