ABSTRACT
This chapter is comprehensive reference manual providing information on the Cognitive Test for Delirium (CTD), which is an objective, clinician-administered test developed to identify patients in an intensive care setting with delirium. The CTD has also been used with younger people with traumatic brain injury. A special feature of its design allows responses to be made exclusively in the non-verbal mode. A brief history of the instrument's development is provided, along with a description of item content and administration/scoring procedures. Psychometric properties are reviewed and a critical commentary is provided. Key references are cited and in most cases the actual scale is included, giving the reader easy access to the instrument.
