PCAD can be applied equally readily to written as well as spoken verbalizations. In the seminal book on the Gottschalk-Gleser method of measuring psychological states and traits, mention was made of this broad applicability (Gottschalk and Gleser, 1969, pp. 256-257), although the method has been much more widely applied to typescripts of verbal communications than to archival, textual, or handwritten language. Some work has been done and reported in the literature, such as analysis of suicide notes. Users need to design their collection protocols carefully, especially when using "found" materials not produced in response to a specific request.