Scoring Manual for the Thought Disorder Index

Johnston, Mary Hollis; Holzman, Philip S.; Solovay, Margie R.; Shenton, Martha E.; Gasperetti, Christine M.; Coleman, Michael J.; Kestnbaum, Ellyn; Carpenter, J. Tyler

doi:10.1093/schbul/12.3.483

Cited by 132 publications

(10 citation statements)

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“…We calculated the TDI following Johnston and Holzman [5]: the protocols were administered and scored according to the TDI man ual. Althought in principle any extended verbal protocol can be used as the raw data for the TDI, Johnston and Holzman [5] typically used verbatim responses to the ten-card Rorschach Test [32,33] and stan dardized the instrument on this basis.…”

Section: Thought Disorder Indexmentioning

confidence: 99%

“…Althought in principle any extended verbal protocol can be used as the raw data for the TDI, Johnston and Holzman [5] typically used verbatim responses to the ten-card Rorschach Test [32,33] and stan dardized the instrument on this basis. We administered the Ror schach Test to all the participating subjects and the sessions were tape-recorded and transcribed verbatim, after all identifying infor mation had been removed from the transcripts.…”

Section: Thought Disorder Indexmentioning

confidence: 99%

“…It is possible to com pare the results on thought disorder assessed with, for example, the Thought Disorder Index (TDI) [5,6], the Scale for the Assessment of Thought. Language, and Com munication [3], the System of Evaluating Bizarre-Idiosyn cratic Thinking [7], or the Object-Sorting Test of Lovibond [8], These methods have been successfully used to evaluate the presence of formal thought disorder in psy chiatric patients.…”

Section: Introductionmentioning

confidence: 99%

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A Preliminary Report of a Strong Genetic Component for Thought Disorder in Normals

et al. 1997

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Several authors have investigated the presence of thought disorder in psychiatric patients using different reliable methods. Under the hypothesis of a genetic predisposition to thought disorder, the degree and quality of thought disorder have also been studied in populations at a high risk for psychosis, in particular for schizophrenia. As a result, an increasing incidence of throught disorder was detected in relatives of schizophrenics. To account for the thought disorder also found in normal subjects, researchers propose that thought disorder exists in normal subjects on a continuum with schizophrenic patients. In the following report, we evaluated the inherited component of thought disorder in normal subjects, using a sample of 25 normal twin pairs, 16 monozygotic and 9 dizygotic twin pairs. We applied the Thought Disorder Index (TDI) to assess disordered thinking, genetic estimates were made with classical methods, controlling for environmental sources of variability where possible. Our findings suggest a strong additive genetic component for the global TDI rating variable, with a heritability estimate approaching 80–90%. New approaches in neuropsychology and neuropsychiatry based on genetic methodologies should further define the cerebral physiology responsible for disordered thinking.

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Section: Thought Disorder Indexmentioning

confidence: 99%

Section: Thought Disorder Indexmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A Preliminary Report of a Strong Genetic Component for Thought Disorder in Normals

et al. 1997

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“…A scored protocol provides the number of responses at each level of severity, the number of responses for each category, and a thought disorder severity total score (Johnston et al, 1986). A total TDI score is derived from the sum of each instance of thought disorder weighted by its severity level and divided by the number of total responses to control for verbal production.…”

Section: Methodsmentioning

confidence: 99%

Putting the person first : an examination of thought disorder and personality heterogeneity in schizophrenia.

Robertson¹

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“…A better measure of thought disorder for this work is the Thought Disorder Index (TDI; Johnston et al, 1986). The TDI is a much more comprehensive scoring system for thought disorder than the subscales of the SAPS and SANS.…”

Section: Future Research and Implicationsmentioning

confidence: 99%

Subjective depression and thought disorder in schizophrenia : are they related?

Briggs

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Scoring Manual for the Thought Disorder Index

Cited by 132 publications

References 1 publication

A Preliminary Report of a Strong Genetic Component for Thought Disorder in Normals

A Preliminary Report of a Strong Genetic Component for Thought Disorder in Normals

Putting the person first : an examination of thought disorder and personality heterogeneity in schizophrenia.

Subjective depression and thought disorder in schizophrenia : are they related?

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