Joel Michell

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INTRODUCTION The poisoning severity score is a four-point severity-classification scale, developed by the International Programme on Chemical Safety, the Commission of the European Union, and the European Association of Poison Centres and Clinical Toxicologists (IPCS/EC/EAPCCT), for the retrospective assessment of cases of poisoning reported to poisons(More)
A pathology of science is defined as a two-level breakdown in processes of critical inquiry: first, a hypothesis is accepted without serious attempts being made to test it; and, second, this first-level failure is ignored. Implications of this concept of pathology of science for the Kuhnian concept of normal science are explored. It is then shown that the(More)
The psychometricians' fallacy concludes that an attribute is quantitative from the premise that it is ordinal. This fallacy occupies a central place in the paradigm of psychometrics. Most of the founders of the discipline committed it and it makes sense of otherwise anomalous developments within the discipline, such as the permissible statistics controversy(More)
Otto Ludwig Ho lder (born, Stuttgart, 1859; died, Leipzig, 1937) was professor of mathematics at the University of Leipzig (Ho lder, 1972) when he published the paper here translated into English. Today, Ho lder is remembered in mathematics for a variety of results, but he is of significance to readers of this journal because of Ho lder's theorem. This(More)
This paper provides an introduction to measurement theory for psychometricians. The central concept in measurement theory is that of a continuous quantitative attribute and explaining what measurement is requires showing how this central concept leads on to those of ratio and real number and distinguishing measurements from measures. These distinctions(More)
In a comment, hitherto unremarked upon, Alfred Binet, well known for constructing the first intelligence scale, claimed that his scale did not measure intelligence, but only enabled classification with respect to a hierarchy of intellectual qualities. Attempting to understand the reasoning behind this comment leads to an historical excursion, beginning with(More)
  • Joel Michell
  • Studies in history and philosophy of biological…
  • 2006
As an aspiring science in the nineteenth and early twentieth centuries, psychology pursued quantification. A problem was that degrees of psychological attributes (most importantly, then, intensities of sensations) were experienced only as greater than, less than, or equal to one another. They were categorised as intensive magnitudes. The meaning of this(More)