What is the "clock test" for dementia?

The clock test for dementia assesses mental performance and is used to determine a person’s ability to recognize and set time. This test involves drawing time-related features such as a clock face and numbers, and is administered and scored by a health clinician, according to Healthline and About.com.

Clock tests can be elaborate and are scored in many different ways. Some tests award points for the ability of the test taker to draw a clock‘s hands and numbers in the correct places according to a time selected by the test examiner, according to About.com. It is common for examiners to ask the test taker to draw a clock with a time displaying 10 minutes after 11 o'clock.