Clinical and non-clinical hallucinations are similarly associated with source memory errors in a visual memory task

Area of Science:

• Cognitive Psychology
• Neuroscience
• Psychiatry

Background:

• Hallucinations are frequently linked to source memory deficits in schizophrenia and healthy individuals.
• Understanding the relationship between hallucinations and memory errors is crucial for developing targeted interventions.

Purpose of the Study:

• To investigate the association between clinical and non-clinical hallucinations and source memory errors.
• To examine memory for contextual information (spatial location, associated visual stimuli) in a visual memory task.

Main Methods:

• A visual memory task was administered to 59 schizophrenia patients and 61 healthy individuals.
• Participants recognized target pictures and recalled their spatial location or associated visual stimuli.
• Statistical analyses controlled for overall memory performance.

Main Results:

• Liberal response bias in recognition correlated with hallucination proneness and auditory-verbal hallucinations.
• Visual hallucinations in male patients were linked to errors in recalling picture location.
• Auditory-verbal hallucinations in female patients and hallucination proneness in healthy women were associated with errors in recalling associated visual stimuli.

Conclusions:

• Both clinical and non-clinical hallucinations are associated with a deficit in retaining contextual information.
• These findings highlight the role of source memory failures in the experience of hallucinations across different populations.