The Clock Drawing Test (CDT) is a simple neuro-psychometric instrument that can be easily applied to assess several cognitive functions. It assesses visuo-spatial task and constructional abilities and therefore can be useful for identifying deficits pertaining to right parietal lobe, constructional apraxia and executive function in patients with schizophrenia. The present study is designed to a...

BACKGROUND/AIMS The Clock Drawing Test (CDT) is used in clinical practice for the screening of cognitive disorders. This systematic review aims to present and discuss the CDT scoring methods available in the literature, in order to find differences in administration and utility of the CDT. METHODS A literature search was carried out in Medline (1966 to June 2008), Psychinfo (1967 to June 2008...

The authors studied the validity of the Clock-Drawing Test (CDT) in comparison with the Mini-Mental State Examination (MMSE) and the association between the CDT and mortality in a large general population sample of persons aged 75 years or more. Data were obtained from the MRC Trial of the Assessment and Management of Older People in the Community. Baseline assessments were conducted between 19...

There is currently a need to develop tools to identify patients with mild AD and mild cognitive impairment (MCI). We determined the validity and reliability of a brief, easily administered cognitive screening battery consisting of fusion of two well-known brief tests (Mini-Mental Status Examination [MMSE] and Clock Drawing Test [CDT]) (Mini-clock) to differentiate between patients with mild AD,...

We define an xyz graph to be a spatial embedding of a 3-regular graph such that the edges at each vertex are mutually perpendicular and no three points lie on an axis-parallel line. We describe an equivalence between xyz graphs and 3-face-colored polyhedral maps, under which bipartiteness of the graph is equivalent to orientability of the map. We show that planar graphs are xyz graphs if and on...