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  1. (PSYCHOLOGY) an excessive or obsessional adherence to social conventions, sometimes seen as one of the components of, or a manifestation of, an AUTHORITARIAN PERSONALITY.
  2. (PHILOSOPHY) the view that scientific knowledge is a matter of convention, rather than something that can be given an entirely secure basis resting on the nature of things, or as arising from unchanging methodological rules or procedures. As an epistemological and an ontological view, conventionalism is at odds with EMPIRICISM or REALISM. See also PRAGMATISM, POSITIVISM.
Collins Dictionary of Sociology, 3rd ed. © HarperCollins Publishers 2000
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



a movement in the philosophical interpretation of science, according to which theories in mathematics and the natural sciences are based on arbitrary agreements (definitions or conventions among scientists) that are chosen entirely on the basis of convenience, expediency, the “principle of economy of thought,” and so on. The founder of conventionalism, H. Poincaré (France), developed conventionalism in reference to physics and, especially, to mathematics. The axiomatization of a number of mathematical disciplines and the development of non-Euclidean geometries, which showed that different geometries equivalent to one another could correspond to the same space, led Poincaré to conclude that geometry does not have an empirical origin and tells us nothing about the real world.

The next phase of conventionalism was associated with the development of mathematical logic in the 1930’s and was expressed with particular clarity in the early works of R. Carnap (Austria) and K. Ajdukiewicz (Poland). Carnap formulated the so-called principle of tolerance, according to which any system whatever of axioms and syntactical rules may be made the foundation of any theory in the natural sciences. Ajdukiewicz developed the point of view of “radical conventionalism,” according to which the representation of the world in science depends on our choice of conceptual apparatus, and in this choice we are free. But neither Carnap nor Ajdukiewicz was subsequently able to develop this view consistently, and they modified their conception. At the present time one does not find conventionalism in a pure form. Certain of its elements are found in neopositivism, pragmatism, and operationalism.

In criticizing conventionalism, dialectical materialism finds it unsound because it denies the objective basis of conventions in science and abstracts from the content of scientific knowledge.


The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
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He was faced with a choice between walking down the path that his conscience, formed by the Word of God, provided for him, or falling into the pit of religious conventionalism and error that he was fighting against.
(4) The second step liberates conventionalism of its utilitarian chains and shows its plural normative core.
Hence Friday the 13th 3D both rewards viewers who have seen the previous two Friday the 13th movies by figuratively assaulting them with its franchise fetishes and encourages new viewers to value such self-reflexive moves for their ostentatious conventionalism. The repetition inherent in its dozen death scenes trains the spectator to embrace the same but different--or more of the same but different for viewers who did see the earlier films.
Hawthorne's conversations with Channing excite him not because they lead to any definite ideas, "not in any angular or rounded truth, which we dug out of the shapeless mass of problematical stuff--but in the freedom which we thereby won from all custom and conventionalism, and fettering influences of man on man" (10:25).