Negative symptom dimensions in first episode psychosis: Is there a difference between schizophrenia and non-schizophrenia spectrum disorders?

Our results show a relevant difference in the negative symptom factor structure between SSD and non-SSD individuals. In particular, a different specificity and significance of negative symptom models in FEP populations with diagnoses other than schizophrenia (compared to those with SSD) must be realistically considered. Notably, a "Motor/Thought Poverty" domain, which specifically includes alogia and motor retardation separately from the other PANSS negative items, appears to specifically characterize FEP young patients with the schizophrenia spectrum.