The Transition From Homogeneous to Heterogeneous Machine Learning in Neuropsychiatric Research.

Publication Type	Review
Authors	Zhao Q, Nooner K, Tapert S, Adeli E, Pohl K, Kuceyeski A, Sabuncu M
Journal	Biol Psychiatry Glob Open Sci
Volume	5
Issue	1
Pagination	100397
Date Published	09/26/2024
ISSN	2667-1743
Abstract	Despite the advantage of neuroimaging-based machine learning (ML) models as pivotal tools for investigating brain-behavior relationships in neuropsychiatric studies, these data-driven predictive approaches have yet to yield substantial, clinically actionable insights for mental health care. A notable impediment lies in the inadequate accommodation of most ML research to the natural heterogeneity within large samples. Although commonly thought of as individual-level analyses, many ML algorithms are unimodal and homogeneous and thus incapable of capturing the potentially heterogeneous relationships between biology and psychopathology. We review the current landscape of computational research targeting population heterogeneity and argue that there is a need to expand from brain subtyping and behavioral phenotyping to analyses that focus on heterogeneity at the relational level. To this end, we review and suggest several existing ML models with the capacity to discern how external environmental and sociodemographic factors moderate the brain-behavior mapping function in a data-driven fashion. These heterogeneous ML models hold promise for enhancing the discovery of individualized brain-behavior associations and advancing precision psychiatry.
DOI	10.1016/j.bpsgos.2024.100397
PubMed ID	39526023
PubMed Central ID	PMC11546160