McClellan is a contemporary philosopher or theorist working in philosophy of medicine or philosophy of science, engaging with questions about how empirical research methods—particularly association studies—bear on the conceptual analysis of medical or psychiatric conditions. Their work addresses the relationship between epidemiological evidence and the ontological or definitional understanding of disease categories.
Argued that association study findings can inform conceptual analysis of medical or psychiatric conditions
Contributed to debates on the relationship between empirical evidence and disease categorization