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The test is available in 46 languages and dialects (as of 2017). In this clock drawing task, the subject is asked to draw a clock with the hours and showing the time 2:30. Successive results show a deterioration of pattern processing ability in a subject as they progress from mild cognitive impairment (MCI) to severe Alzheimer's disease (AD).
Norman H. "Mack" Mackworth (1917–2005) was a British psychologist and cognitive scientist known for his pioneering work in the study of boredom, attention, and vigilance; [1] the Mackworth Clock test has been used since the 1940s in the study of vigilance.
The user/general practitioner is asked to conduct the informant interview. Someone scoring 4 points or less is very likely to have cognitive impairment. There is no need to complete the informant interview. However, the conduction of standard investigations such as lab tests is required to rule out reversible causes of cognitive impairment.
It comprises tests of attention, memory (7-item name and address), letter fluency, clock drawing, and memory recall, and takes under five minutes to administer. The M-ACE is scored out of 30, with a higher score indicating better cognitive function, and has two recommended cut-off scores (25 and 21). The higher cut-off score has both high ...
The Mackworth Clock is an experimental device used in the field of experimental psychology to study the effects of long term vigilance on the detection of signals. It was originally created by Norman Mackworth as an experimental simulation of long term monitoring by radar operators in the British Air Force during World War II. [ 1 ]
The test was initially developed using a veteran population, but has since been adopted as a screening tool for any individual displaying signs of mild cognitive impairment. The intended population typically consists of individuals 60 years and above that display any signs of cognitive deficit. [ 3 ]
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Cognitive screening tests may also have the opposite problem, falsely indicating that a person does not have dementia, especially if that person had a higher level of education or intelligence originally. The IQCODE attempts to overcome this problem by assessing change from earlier in life, rather than the person's current level of functioning.