L'arte frattale di Jeannette Rütsche - Sperya

(pag. 727)

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Ultimately, then, clinicians must choose between their own observations or impressions and the scientific evidence on the relative efficacy of the clinical and actuarial methods. The factors that create difficulty in self-appraisal of judgmental accurancy are exactly those that scientific procedures, such as unbiased sampling, experimental manipulation of variables, and blind assessment of outcome, are designed to counter. Failure to accept a large and consistent body of scientific evidence over unvalidated personal observation may be described as a normal human failing or, in the case of professionals who identify themselves as scientific, plainly irrational.
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