Madeleine Lemieux and Georges Bordage
نویسندگان
چکیده
Two approaches to the study of diagnostic thinking are compared, one mainly propositional, namely that of Pate1 and Groen (1986), the other mainly semantic, that of Lemieux and Bordage (1986). Pate1 and Groen analyzed the linear dimension of cardiologists’ discourses while solving a case of acute bacterial endocarditis, that is, the before and after propositional rules. A secondary analysis of two of their pathophysiological protocols is done using structural semantic techniques from Lemieux and Bordoge where the vertical dimension of the discourses is analyzed, that is, the levels of meaning or semantic axes. Contrary to Pate1 and Groen’s position, making an accurate diagnosis Is not explained in terms of pure forward reasoning through networks of causal rules, but by means of networks of semantic qualities abstracted from the symptoms and signs. The semantic qualities operate in the clinician’s mind in terms of binary appositions (e.g., suddengradual, unilateral-biloteral) whereby each pair of properties constitutes a semantic axis (e.g., sudden-gradual). The successful diagnosticians are those who use the most diversified and pertinent set of semantic axes and, therefore, have a deeper representation of the problem.
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