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CDT — Sunderland 1989

The Clock

Place the clock hands at the indicated time. Structured version of the Clock Drawing Test — a visuospatial test sensitive to cognitive decline.

For each indicated time, drag the short hand (hours) and the long hand (minutes) to the correct positions. Minutes align in 5-minute increments. There are 6 trials.

What is the Clock Drawing Test?

The Clock Drawing Test (CDT) is a rapid and highly sensitive test from neuropsychology, used as part of the Mini-Cog and the Montreal Cognitive Assessment (MoCA). In the classic version, the patient draws a clock on paper with numerals and hands indicating a given time. It requires the integration of several cognitive functions: visuospatial perception, planning, sequencing, semantic memory, and motor coordination.

Our version is structured: you start with a clock that already has its numerals drawn, and your task is to move the hands to the correct positions. This reduces clinical sensitivity (free-drawing reveals more pathological patterns) but allows consistent self-assessment without imprecise mouse movements or tremor. Errors remain relevant: a wrong hour-hand indicates number-processing difficulties; a wrong minute-hand indicates angle-calculation difficulties.

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Scientifically verified sources

Based on scientific research

Ceasul 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.

  • Clock Drawing Test in DementiaPeer-reviewed study
    Journal of the American Geriatrics Society · 1989

    Sunderland 1989: validarea clinica a testului desenului de ceas pentru screening dementa.

    pubmed.ncbi.nlm.nih.gov
  • Clock Drawing Test reviewPeer-reviewed study
    PMC / NIH · 2010

    Review modern: CDT screening rapid si sensibil, parte din baterii MoCA si Mini-Cog.

    pmc.ncbi.nlm.nih.gov

🌍 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.