Finally, the work group has proposed including a 0-4 rating scale (4 representing the most severe) for nine dimensions of psychotic symptomatology: delusions, hallucinations, disorganization,
restricted emotional expression, avolition/asociality, impaired cognition, depression, mania, and psychomotor symptoms. The proposal is part of a movement generally in the development of
DSM-5 toward a "dimensional approach," reflecting emerging research evidence that different disorders share certain features—which may vary in severity from patient to
patient—potentially expressive of common genetic endophenotypes.