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WAIS-IV Digit Span

Digit Span

Remember the digit sequence and type them in the same order (forward) or in reverse order (backward). Classic WAIS-IV test.

Digits appear one at a time, one by one. After they all disappear, type them in the correct order. Span increases gradually. The game stops when you make 2 mistakes at the same length.

What is Digit Span?

Digit Span is the most widely used subtest in the WAIS-IV battery (Wechsler Adult Intelligence Scale) for assessing working memory. The examiner presents a series of digits at a rate of one per second, and the participant must repeat them — either in the same order (forward) or in reverse order (backward). Span = maximum length achieved.

Forward tests passive short-term storage capacity; backward tests the additional active manipulation of information (you must mentally reverse the sequence). Backward declines more rapidly with age and is more sensitive to frontal lobe dysfunction.

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Scientifically verified sources

Based on scientific research

Digit Span is a digital adaptation of clinically validated neuropsychological tests. Below you will find the official sources underpinning the methodology, along with international and Romanian medical institutions you can consult for a professional assessment.

📚 Studies and clinical validation

The original scientific papers and validation studies that demonstrate this paradigm measures what it claims to measure.

🌍 Recommendations from international medical institutions

Global organisations (NIH, Mayo Clinic, Alzheimer's Association, WHO, Lancet) that recommend cognitive training as part of a healthy routine for older adults. Direct links to official documents.

🇷🇴 Clinical assessment in Romania

If low scores recur, speak with a doctor. Here is where you can seek specialist advice in Romania — the only national Alzheimer's NGO, the relevant ministry, university neurology clinics, and accredited medical universities.

Important: This game is informational and educational. It is not a medical diagnostic tool. For a clinical assessment, consult a neurologist or psychiatrist. Repeatedly low scores are worth discussing with your GP as an indicator (similar to weighing yourself at home), not as a diagnosis.