This theoretical framework proposes that what psychiatry classifies as schizophrenia-spectrum, bipolar-spectrum, and autism-spectrum disorders are not rare, discrete pathologies, but reflect universal human dimensions that become clinically significant under specific environmental and cognitive conditions. Across more than 5,000 individuals observed in diverse contexts, each individual observed expressed at least two dimensions in combination. Isolated single-dimension or zero-dimension profiles were not detected. These three spectra are proposed as core dimensional systems of the human mind: Dimension X (Perceptual-Ideational): Governs perceptual and ideational processing style, ranging from mild expression through moderate to severe. This dimensional architecture shares biological and genetic substrates with what psychiatry diagnoses as schizophrenia-spectrum disorders. Dimension Y (Social-Cognitive): Governs social-cognitive processing style, ranging from mild expression through moderate to severe. This dimensional architecture shares biological and genetic substrates with what psychiatry diagnoses as autism-spectrum disorders. Dimension Z (Affective-Energetic): Governs affective intensity and energy regulation, ranging from mild expression through moderate to severe. This dimensional architecture shares biological and genetic substrates with what psychiatry diagnoses as bipolar-spectrum disorders. These dimensional configurations are not themselves disorders. They become clinically significant only when environmental factors and maladaptive cognitive patterns intensify them to impairing levels, regardless of baseline intensity. A person with mild dimensional expression can develop clinical disorder if subjected to severe adversity and maladaptive thinking, while someone with severe dimensional expression can remain adaptive and functional with adequate environmental support and healthy cognitive patterns. This framework aligns with dimensional models such as HiTOP and the p-factor but goes further: rather than viewing overlap as comorbidity of separate conditions, it proposes these three dimensions form the basic structure of human dimensional variation. Recent genomic research suggests that these conditions share overlapping genetic architecture (Cross-Disorder Group of the Psychiatric Genomics Consortium, 2013), with schizophrenia and bipolar disorder in particular sharing the majority of their genetic signal (Grotzinger et al., 2025), supporting the proposal that traditionally distinct conditions reflect shared biological substrates.
Prasun Katiyar (Thu,) studied this question.