Hostname: page-component-cd9895bd7-dzt6s Total loading time: 0 Render date: 2024-12-22T19:45:38.253Z Has data issue: false hasContentIssue false
  • English
  • Français

The Clock Reading Test: validation of an instrument for the diagnosis of dementia and disorders of visuo-spatial cognition

Published online by Cambridge University Press:  06 December 2006

Klaus Schmidtke  and
Susanne Olbrich
Get access

Abstract

Background: The 12-item Clock Reading Test (CRT) allows a fine-graded assessment of clock-reading ability. It has a strong focus on visuo-spatial processing and requires no executive processing. This study evaluated the reliability, validity, sensitivity and specificity of the CRT for the diagnosis of dementia and visuo-spatial dysfunction.

Methods: The CRT, the Clock Drawing Test (CDT) and other tests were applied to groups of 200 subjects with dementia, 105 subjects with mild cognitive impairment (MCI), 20 subjects with focal parietal lesions and 64 elderly control subjects.

Results: The CRT was found to be reliable and sensitive for the detection of cognitive impairment in parietal lesions, Alzheimer-, mixed- and Lewy Body dementia. Normal subjects and patients with MCI, frontotemporal dementia or cerebral small vessel disease showed little or no impairment.

Conclusion: CRT and CDT are clock-processing tests with different demand profiles. They can supplement each other in the neuropsychological diagnosis of dementia and visuo-spatial dysfunction.

Keywords

Clock Drawing TestneuropsychologydementiadiagnosisAlzheimer's disease
Type
Research Article
Information
International Psychogeriatrics , Volume 19 , Issue 2 , April 2007 , pp. 307 - 321
Copyright
International Psychogeriatric Association 2007

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)