No evidence for a generalised predictive processing deficit in psychosis: A meta-analysis.
Chantal Miller-Silva, Benjamin J G Illingworth, Kirsten Martey et al.
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In 30 seconds
This meta-analysis evaluated the predictive processing theory of psychosis by analyzing 34 results from 27 studies involving 904 individuals with schizophrenia-spectrum psychosis and 1,039 healthy controls. The analysis found no evidence for atypical reliance on priors in psychosis (g = 0.03, p = 0.818), challenging the notion of a generalized predictive processing deficit in this population.
Key findings
- No evidence for atypical reliance on priors in psychosis (g = 0.03, p = 0.818).
- No significant association between reliance on priors and delusions (r = -0.16, p = 0.293).
- No significant association between reliance on priors and hallucinations (r = 0.04, p = 0.780).
- Sub-group analysis did not support a two-level hierarchical model of priors (F(1,32) = 0.1, p = 0.758).
Why it matters
Understanding the mechanisms underlying psychosis is crucial for developing effective interventions. This study challenges existing theories, suggesting that psychosis may not involve a generalized predictive processing deficit, which could influence future research and treatment approaches.