Abstract
Background: Clock drawing is part of the Montreal Cognitive Assessment (MoCA) test but may have administration and scoring limitations. We assessed (1) the reliability of the MoCA clock criteria relative to a published error scoring approach, (2) whether command-only administration could distinguish dementia from cognitively intact individuals and (3) the value of adding a clock copy condition to the MoCA. Methods: Three novice raters and clocks from dementia and control participants were used to assess the 3 aims. Results: MoCA interrater and intrarater reliability were low (i.e. intraclass correlation coefficient = 0.12-0.31) and required repeat training. Clocks drawn to command classified dementia at chance. Inclusion of a copy condition demonstrated expected dementia subgroup patterns. Conclusion: Reliable clock scoring with MoCA criteria requires practice. Supplementing a clock copy to the standard MoCA test (takes <1 min) will improve dementia assessment.
Original language | English (US) |
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Pages (from-to) | 179-187 |
Number of pages | 9 |
Journal | Dementia and Geriatric Cognitive Disorders |
Volume | 31 |
Issue number | 3 |
DOIs | |
State | Published - Apr 2011 |
Externally published | Yes |
All Science Journal Classification (ASJC) codes
- Geriatrics and Gerontology
- Cognitive Neuroscience
- Psychiatry and Mental health