ing away from tense, this example can be formalized by the DRS in figure 2.3. The linear notation for this DRS is man fat push bicycle poss male . Let us consider this DRS in the context of a DRS which informs us about the situational background.

The DRS-R-98, a 16-item clinician-rated scale with 13 severity items and 3 diagnostic items, was validated against the Cognitive Test for Delirium (CTD), Clinical Global Impression scale (CGI), and Delirium Rating Scale (DRS) among five diagnostic groups (N=68): delirium, dementia, depression, schizophrenia, and other. Mean and median DRS-R-98 scores significantly (P<0.001) distinguished deliri...