HiTOP (dimensional model of psychopathology)
A research-led system that describes mental health problems as dimensions rather than categories, arranged in a hierarchy: a general factor at the top, broad spectra (internalising, thought disorder, disinhibited externalising, antagonistic externalising, detachment, somatoform) and narrower syndromes and traits beneath.
What drives it
Explains why diagnoses co-occur so much and why thresholds feel arbitrary: problems sit on continua shared with normal personality. For identification, it encourages asking 'How much of which tendencies?' rather than 'Which label?'
How it shows
Work
Helps you see a colleague as high on detachment and negative emotionality rather than 'depressed' or 'difficult'. Explains why the same person can look anxious one year and depressed the next.
Relationships
Lets you describe a partner's pattern (for example high antagonism plus disinhibition) without reaching for a stigmatising diagnosis. Fits how relationships actually feel: by degree, not by category.
Self
Asks you to place yourself on dimensions (how anxious, how detached, how impulsive) rather than deciding whether you 'have' something. Most people find they are somewhat elevated on a few.
What tells it apart
DSM-5-TR and ICD-11: DSM and ICD decide yes or no against a checklist; HiTOP gives a score on several dimensions, so two people with the same DSM diagnosis can have very different profiles.
Big Five (Five-Factor Model): The Big Five describes normal personality; HiTOP spectra map onto Big Five traits at their extremes (internalising with neuroticism, detachment with low extraversion, antagonism with low agreeableness, disinhibition with low conscientiousness).
Comorbidity: Comorbidity treats overlap as multiple disorders; HiTOP treats it as one person sitting high on a shared spectrum.
A test
When someone seems to collect diagnoses, map them instead on the HiTOP spectra and see whether one or two broad dimensions explain the whole picture.
Questions to carry
- Laid out as degrees of a few broad tendencies, how much of the list of diagnoses collapses into one or two?
- If I described myself by how much of which tendencies instead of by a label, what would change in the story?
How strong the research is
moderate. Structural findings replicate well across samples, but clinical utility and treatment guidance are still being developed and tested.
Where it comes from
Roman Kotov, Robert Krueger, David Watson and colleagues, 2017; general 'p factor' by Avshalom Caspi and colleagues, 2014
Sources
- Roman Kotov and colleagues, The Hierarchical Taxonomy of Psychopathology (HiTOP): A Dimensional Alternative to Traditional Nosologies (2017)