Methods. A cross-sectional study was performed for 13 cognitively intact and 55 early dementia subjects attending a memory clinic in Singapore. The clock drawings were scored according to comprehensive (Lin’s 16-item clock drawing and clock copying) and abbreviated (Lin’s simplified, Watson, Schulman) protocols. Diagnostic performance and optimal cut-off scores were determined, using receiver o...

Background: Relative to the abundance of publications on dementia and clock drawing, there is limited literature operationalizing ‘normal’ production. Objective: To operationalize subtle behavioral patterns seen in normal digital drawing command copy conditions. Methods: From two research cohorts cognitively-well participants age 55 plus who completed conditions (n = 430), we examined variables...

This thesis deals with planar drawings of planar graphs such that each interior face has a prescribed area. Our work is divided into two main sections. The first one deals with straight-line drawings and the second one with orthogonal drawings. For straight-line drawings, it was known that such drawings exist for all planar graphs with maximum degree 3. We show here that such drawings exist for...