Clock Drawing Test: A Neuropsychological Assessment Tool Introduction The Clock Drawing Test (CDT) is a simple and quick neuropsychological assessment tool that can help identify cognitive impairments in patients with conditions such as dementia, stroke, and brain injury. The test has been used for over 50 years as a quick and easy way to assess various aspects of cognitive function, including visuospatial ability, executive function, and language skills. How does the CDT work? The test is conducted by asking the patient to draw a simple clock face on a blank piece of paper and place the numbers in the correct order. The patient is then asked to place the hands on the clock to indicate a specific time, such as 10 after 11. The clock drawing can be scored based on specific criteria, including the presence of numbers and the placement of the hands. What does the CDT measure? The CDT is used to assess several aspects of cognitive function, including visuospatial ability, executive functio