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Alogia and formal thought disorder: differential patterns of verbal fluency task performance
Anna R Docherty1, Howard Berenbaum, John G Kerns
1Department of Psychological Sciences, University of Missouri, Columbia, MO 65211, USA.
Journal of Psychiatric Research
|May 11, 2011
Summary
Alogia in schizophrenia is linked to slower word recall, indicating retrieval issues. Formal thought disorder (FTD) is associated with difficulties in semantic context processing during verbal fluency tasks.
Area of Science:
- Cognitive Neuroscience
- Psychiatry
- Linguistics
Background:
- Schizophrenia presents with speech disturbances like alogia and formal thought disorder (FTD).
- These symptoms are hypothesized to correlate with distinct deficits in verbal fluency tasks.
- Verbal fluency relies on cognitive functions such as controlled retrieval, semantic memory, and context processing.
Purpose of the Study:
- To investigate the association between alogia and FTD with specific verbal fluency performance patterns.
- To determine if these patterns implicate deficits in controlled retrieval, semantic memory, or context processing.
Main Methods:
- Thirty-four individuals with schizophrenia participated in the study.
- Participants completed letter and category verbal fluency tasks.
- Detailed symptom ratings for alogia and FTD were derived from typed transcripts.
Main Results:
- Alogia correlated with increased latency between words in category fluency, suggesting impaired controlled retrieval.
- FTD was linked to a lower proportion of semantically related words in letter fluency, indicating poor context processing.
Conclusions:
- Alogia and FTD are associated with unique verbal fluency performance patterns.
- These distinct patterns suggest that alogia and FTD involve separate underlying cognitive mechanisms.
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