Paul Meehl

Meehl contrasted unaided professional judgment with predictions produced by explicit statistical or actuarial rules. In his 1954 book Clinical Versus Statistical Prediction, he argued that mechanical methods generally matched or outperformed clinicians across the evidence he reviewed.

No. His argument targeted situations in which clinicians informally combined known data even though a validated statistical rule could perform that task more consistently; he still recognized roles for observation, theory, and gathering new information.

Taxometrics is a family of methods Meehl helped develop to test whether a psychological construct is categorical or continuously distributed. Researchers have used these procedures in debates over whether conditions or traits represent distinct taxa rather than arbitrary cutoffs on dimensions.

Meehl worked at the University of Minnesota, where the MMPI was developed, and contributed influential research on interpreting personality-test patterns. His broader work emphasized validating predictions against outcomes instead of relying only on clinicians' impressions.