Bridging the phenomenological gap between predictive basic-symptoms and attenuated positive symptoms: a...

Area of Science:

• Psychiatry and Psychology
• Neuroscience
• Clinical Psychology

Background:

• Young people at clinical high-risk of psychosis (CHRp) often present with attenuated positive symptoms (APS) or basic symptoms (BS).
• Distinguishing and understanding the relationship between non-psychotic BS and psychotic-like APS is crucial for early psychosis intervention.
• Existing theories suggest shared underlying mechanisms, but empirical validation is needed.

Purpose of the Study:

• To explore the interrelationship between APS and predictive BS in a CHRp population using network analysis.
• To identify specific 'bridge symptoms' that connect the BS and APS domains.
• To provide empirical support for theoretical accounts of psychosis etiology.

Main Methods:

• Network analysis was applied to data from 231 CHRp patients (mean age 24.4 years, 65% male).
• Symptoms from BS and APS criteria sets were analyzed to map their interconnections.
• Emphasis was placed on identifying symptoms that bridge the two symptom domains.

Main Results:

• Specific BS, such as 'unstable ideas of reference,' directly interacted with attenuated delusional ideation (APS).
• Perceptual BS were found to be linked with perceptual APS.
• Predictive cognitive basic BS, though central to the network, showed relative isolation from APS.

Conclusions:

• The findings empirically support theories linking BS and APS through impairments in source monitoring and perspective-taking.
• Identifying bridge symptoms between BS and APS offers a pathway to better understand psychosis etiology.
• This research can inform the development of tailored interventions for individuals at high risk of psychosis.