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Related Experiment Video

Updated: Oct 23, 2025

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Psychosis Biotypes: Replication and Validation from the B-SNIP Consortium.

Brett A Clementz1, David A Parker1, Rebekah L Trotti1

  • 1Departments of Psychology and Neuroscience, BioImaging Research Center, University of Georgia, Athens, GA, USA.

Schizophrenia Bulletin
|August 19, 2021
PubMed
Summary

Psychosis Biotypes, a novel biomarker approach, identify three distinct neurobiological subtypes of schizophrenia, schizoaffective, and bipolar disorder with psychosis, offering potential for targeted treatments.

Keywords:
BiotypesEEGbiomarkersclassificationcognitionpsychosissaccades

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Area of Science:

  • Neuroscience
  • Psychiatry
  • Biomarker Research

Background:

  • Current psychiatric diagnoses lack biological specificity, hindering personalized treatment.
  • Phenomenological diagnoses do not capture neurobiological variations in psychosis.

Purpose of the Study:

  • To develop and validate a biomarker-based subtyping system for psychosis (Psychosis Biotypes).
  • To investigate if neurobiological subtypes align better with underlying disease mechanisms than clinical diagnoses.

Main Methods:

  • Utilized two large independent samples (N=985 and N=915) of psychosis cases and healthy controls.
  • Assessed 44 biomarkers across cognition, motor inhibition, saccadic eye movements, and auditory EEG/ERP.
  • Applied numerical taxonomy (k-means clustering) to identify distinct neurobiological clusters (Biotypes).

Main Results:

  • Identified three highly replicable Psychosis Biotypes across both samples.
  • Biotypes demonstrated distinct neurobiological profiles, including cognitive function, neural response magnitudes, and sensory motor inhibition.
  • Biotypes-1 and -2 showed impaired cognition, with Biotype-1 characterized by low neural responses and Biotype-2 by overactive responses and poor inhibition.

Conclusions:

  • Psychosis Biotypes offer a neurobiologically grounded classification system for psychosis.
  • This approach captures biological homology missed by conventional diagnostic categories.
  • Biotypes may provide valuable targets for developing novel treatments and understanding psychosis etiology.