The thought disorder questionnaire.
OBJECTIVE
To describe the development of the Thought Disorder Questionnaire (TDQ), including data on reliability and validity, and to explain the questionnaire's feasibility and diagnostic accuracy.


METHODS
The TDQ has 6 scales, each with 10 items (on a scale from 0 [for never] to 4 [for always]). The 6 scales measure content of thought, control of thought, orientation, perception, fantasy, and symptoms.


RESULTS
The TDQ is a reliable 60-item, self-report questionnaire that measures the quantity and quality of disordered thinking in patients with mental disorders. It has established reliability and validity.


CONCLUSIONS
The TDQ's clinical and research utility remains to be determined.
Waring
Edward M
EM
University of British Columbia, Surrey Mental Health Services, Surrey Memorial Hospital, Surrey, British Columbia. ted.waring@sfvhr.hnet.bc.ca
Neufeld
R W J
RW
Schaefer
B
B
D003072:Cognition Disorders / Q000175:diagnosis* / Q000209:etiology*; D005240:Feasibility Studies; D006801:Humans; D011618:Psychotic Disorders / Q000523:psychology*; D015203:Reproducibility of Results; D011795:Surveys and Questionnaires; D013850:Thinking