American Journal of Alzheimer's Disease and Other Dementias®

 

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This version was published on August 1, 2008
American Journal of Alzheimer's Disease and Other Dementias®, Vol. 23, No. 4, 377-381 (2008)
DOI: 10.1177/1533317508316680

The Clock-Drawing Test: Time for a Change?

Amy Chan, PhD

Center for Cellular Neurobiology and Neurodegeneration Research, Department of Biological Sciences, University of Massachusetts, Lowell, MA

Ruth Remington, PhD

Department of Nursing, University of Massachusetts Lowell, Massachusetts

James Paskavitz, MD

CNS Imaging, Perceptive Informatics Inc, Waltham, Massachusetts

Thomas B. Shea, PhD

Center for Cellular Neurobiology and Neurodegeneration Research, Department of Biological Sciences, University of Massachusettes, Lowell, Massachusetts,Thomas_Shea{at}uml.edu

Clock-drawing tests are simple and rapid screening devices for dementia. It was observed that individuals <60 years of age showed similar performance with a digital prompt (" . . .make the clock read 12:45") or an analog prompt (" . . .quarter to 1"), whereas individuals >70 years of age showed improved performance with an analog prompt. The digital prompt has routinely been used to force participants to recode the prompt via conceptualization. Differential scoring across a range of ages has likely derived from the advent and increase of digital clocks with the younger segment of the population. This implies the need for as-yet undetermined alteration in the nature of prompts to force recoding as the current younger population ages.

Key Words: clock-drawing test • cognition • aging • Alzheimer disease


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