Clock drawing test

Abstract

The clock drawing test (CDT) has long been recognized as a useful component for the screening of cognitive disorders. It provides a user-friendly visual representation of cognitive functioning that is simple and rapidly administered, making it appealing to clinicians and patients alike. The ease of use and wide range of cognitive abilities required to complete the CDT successfully have made this test an increasingly popular cognitive screening measure in both research and clinical settings. This chapter summarizes and compares the numerous CDT scoring methods that have been described in the literature. Also, psychometric properties are presented for the CDT when used for cognitive screening in a variety of neurologic conditions, including Alzheimer’s disease, Parkinson’s disease, Huntington’s disease, vascular disease, schizophrenia, stroke, and traumatic brain injury. The potential for longitudinal monitoring, as well as cultural, ethnic, and educational considerations, for the CDT are also discussed.