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Auditory verbal hallucinations and cognitive functioning in healthy individuals.
Kirstin Daalman1, Martine van Zandvoort, Florian Bootsman
1Department of Psychiatry, Neuroscience Division, University Medical Center Utrecht & Rudolf Magnus Institute for Neuroscience, Heidelberglaan 100, 3584 CX Utrecht, The Netherlands. K.Daalman@umcutrecht.nl
Schizophrenia Research
|August 16, 2011
Summary
Healthy individuals experiencing auditory verbal hallucinations (AVH) show distinct cognitive differences. This suggests a predisposition linked to executive functioning and language, potentially involving inhibition difficulties.
Area of Science:
- Neuroscience
- Cognitive Psychology
- Psychiatry
Background:
- Auditory verbal hallucinations (AVH) are a hallmark of schizophrenia but also occur in healthy individuals.
- Cognitive deficits are linked to AVH in schizophrenia, but isolating specific traits is challenging.
- Studying AVH in healthy individuals may clarify the cognitive underpinnings of hallucination proneness.
Purpose of the Study:
- To investigate the cognitive profile of healthy individuals experiencing AVH.
- To identify specific cognitive domains associated with AVH in a non-clinical population.
- To explore potential predispositions for AVH based on cognitive functioning.
Main Methods:
- Compared cognitive performance between 101 healthy individuals with AVH and 101 matched healthy controls.
- Assessed executive functioning, memory, processing speed, spatial ability, lexical access, abstract reasoning, language, and intelligence.
- Matched participants on gender, age, handedness, and education.
Main Results:
- Significant differences were found in verbal domain performance and executive functioning between groups.
- No significant differences were observed in other cognitive domains assessed.
- All participants performed within the normal cognitive range.
Conclusions:
- The predisposition to experience AVH in healthy individuals is associated with lower executive functioning and aberrant language performance.
- These cognitive differences may stem from difficulties in inhibiting irrelevant verbal information.
- Findings highlight specific cognitive traits potentially linked to AVH proneness.
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