| Hallucinations | Most commonly auditory (hearing voices), but can involve any sensory modality |
| Delusions | Fixed false beliefs resistant to contradictory evidence (paranoid, grandiose, somatic, religious) |
| Disorganized thinking | Formal thought disorder manifested as tangential, incoherent, or illogical thought processes |
| Bizarre behavior | Inappropriate or unpredictable actions, catatonia in severe cases |
| Affective flattening | Reduced emotional expression and reactivity |
| Alogia | Reduced speech output and poverty of speech |
| Avolition | Lack of motivation and reduced goal-directed activity |
| Anhedonia | Inability to experience pleasure |
| Social withdrawal | Reduced interest in social interactions |
| Working memory impairment | Inability to hold and manipulate information |
| Attention deficits | Difficulty sustaining focus and filtering irrelevant stimuli |
| Executive dysfunction | Problems with planning, reasoning, and cognitive flexibility |
| Databases | OMIMOrphanetClinicalTrialsPubMed |