Distributionalism is a general theory of language and a discovery procedure for establishing elements and structures of language based on observed usage. The purpose of distributionalism was to provide a scientific basis for syntax as independent of meaning. Zellig Harris defined 'distribution' as follows.
Based on this idea, an analysis of immediate constituents could be based on observing the environments in which an element, such as a word, appears in corpora.
Charles Francis Hockett (January 17, 1916 – November 3, 2000) was an American linguist who developed many influential ideas in American structuralist linguistics. He represents the post-Bloomfieldian phase of structuralism often referred to as "distributionalism" or "taxonomic structuralism". His academic career spanned over half a century at Cornell and Rice universities. Hockett was also a firm believer of linguistics as a branch of anthropology, making contributions that were significant to the field of anthropology as well.
Leonard Bloomfield (April 1, 1887 – April 18, 1949) was an American linguist who led the development of structural linguistics in the United States during the 1930s and the 1940s. He is considered to be the father of American distributionalism. His influential textbook Language, published in 1933, presented a comprehensive description of American structural linguistics. He made significant contributions to Indo-European historical linguistics, the description of Austronesian languages, and description of languages of the Algonquian family.
Bloomfield's approach to linguistics was characterized by its emphasis on the scientific basis of linguistics and emphasis on formal procedures for the analysis of linguistic data. The influence of Bloomfieldian structural linguistics declined in the late 1950s and 1960s as the theory of generative grammar developed by Noam Chomsky came to predominate.
Distributional semantics is a research area that develops and studies theories and methods for quantifying and categorizing semantic similarities between linguistic items based on their distributional properties in large samples of language data. The basic idea of distributional semantics can be summed up in the so-called distributional hypothesis: linguistic items with similar distributions have similar meanings.