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First published on May 4, 2008, doi:10.1177/1533317508316680

American Journal of Alzheimer's Disease and Other Dementias® 2008;23:377.

A more recent version of this article appeared on August 1, 2008

Article

The Clock-Drawing Test: Time for a Change?

Amy Chan, Ruth Remington, Thomas B. Shea*, and James Paskavitz, MD

* To whom correspondence should be addressed. E-mail: Thomas_Shea{at}uml.edu.


  Abstract
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.


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