Clock Drawing Test

The clock drawing test is more diagnostically accurate than standard memory tests for detecting early cognitive impairment. The clock drawing test is one of the most sensitive clinical indicators of early cognitive deficits. The clock drawing test evaluates processing speed, attention, visuospatial ability, and executive function — not just memory. Slowed processing speed and attention deficits can appear in early dementia long before obvious memory problems. The standard clock drawing test requires drawing a clock set to 10 minutes after 11:00 within 30 seconds. Neurologists use the clock drawing test as an early screening tool for Alzheimer's disease and dementia.