“…This was, at least in part, because of the loosely defined reported diagnoses (e.g., depression) and the lack of information about the diagnostic criteria used in the studies. In addition, issues surrounding the state dependency of the MMPI (e.g., Archer, Gordon, Zillmer, & McClure, 1985; Lumry, Gottesman, & Tuason, 1982) surface when subjects within the studies take the MMPI at differing points in their treatment. Finally, questions about the validity of the diagnostic classification systems themselves remain unanswered and are likely to pose problems in this area of research for many years to come.…”