Disruption of information processing in schizophrenia: The time perspective

Area of Science:

• Cognitive Neuroscience
• Psychiatry
• Neuroscience

Background:

• Schizophrenia is associated with temporal processing disorders at both automatic and subjective levels.
• Patients exhibit difficulties in discriminating simultaneous vs. asynchronous events and ordering events in time.

Purpose of the Study:

• To investigate temporal processing in schizophrenia, focusing on sub-threshold stimulus onset asynchronies.
• To explore the relationship between elementary temporal impairments and subjective timing difficulties.
• To examine the impact of temporal processing deficits on cognitive and clinical symptoms.

Main Methods:

• Review of existing studies on time perception in schizophrenia.
• Analysis of stimulus onset asynchrony detection thresholds.
• Correlation of temporal processing measures with clinical disorganization.

Main Results:

• Neither patients nor controls merge events for asynchronies below 20 ms; subjects implicitly distinguish events.
• Controls favor the last stimulus, while schizophrenia patients favor the first stimulus at sub-threshold asynchronies (as low as 8 ms).
• This patient-specific bias predicts difficulties in conscious time perception and correlates with clinical disorganization.

Conclusions:

• Schizophrenia involves a fundamental difficulty in temporal binding and information processing continuity.
• Temporal processing deficits may bridge the gap between cognitive impairments and clinical symptoms in schizophrenia.
• Predictive coding frameworks may explain the implicit updating of events and temporal perception disruptions.