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Investigating thought disorder in schizophrenia with the lexical decision task
Schizophrenia Research
|August 15, 1995
Summary
Thought-disordered schizophrenics showed normal priming effects, suggesting intact semantic memory. This indicates that the associative processes in schizophrenia may occur later than those studied.
Area of Science:
- Cognitive Psychology
- Neuroscience
- Psychiatry
Background:
- Prior research indicates hyperpriming in schizophrenia, linked to persistent associational activation in thought disorder.
- Understanding the localization of priming patterns is crucial for elucidating cognitive deficits in schizophrenia.
Purpose of the Study:
- To investigate priming effects in thought-disordered (TD) and non-thought-disordered (NTD) schizophrenic patients compared to controls.
- To localize the patterns of semantic priming using a lateralized lexical decision task.
Main Methods:
- Administered a lateralized lexical decision task to 10 TD schizophrenics, 10 NTD schizophrenics, and 11 control subjects.
- Presented associated, unassociated, and neutral prime-target pairs across various visual field locations (center, left visual field (LVF), right visual field (RVF)).
Main Results:
- Thought-disordered schizophrenics exhibited priming effects comparable to non-thought-disordered schizophrenics and control subjects.
- These findings suggest intact semantic memory structures and processes under the studied conditions.
Conclusions:
- The study challenges the notion of widespread semantic memory impairment in schizophrenia, particularly in TD individuals.
- It is hypothesized that the associative processes contributing to priming effects in schizophrenia may occur later in the cognitive sequence than those investigated here.