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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.
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 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).
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 ]
Neuropsychological tests are typically administered to a single person working with an examiner in a quiet office environment, free from distractions. As such, it can be argued that neuropsychological tests at times offer an estimate of a person's peak level of cognitive performance.
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