Difference between revisions of "Separation hypothesis"

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Revision as of 15:54, 2 March 2009

The Separation Hypothesis is a hypothesis due to Robert Beard, which entails that the form of inflectional and derivational affixes is separated from their function. Beard distinguishes L-rules and M-rules, and assumes that L-rules are grammatical processes which change or add information about grammatical functions (e.g. 'plural' or 'agent noun'), while M-rules are affixation rules which spell out the grammatical functions.


English plurals are formed in a number of ways, as is shown in (i):

(i) cat-cats, bus-busses, alga-algae, paramecium-paramecia, goose-geese

Under the separation hypothesis there is a single L-rule of pluralization which simply adds the feature [plural]. The resulting abstract morpheme is input to different M-rules, and these rules spell out the actual phonological form of the plurals in (i). On the other hand, conversion can be seen to be simply the situation which arises when an L-rule applies, but no M-rule gets the chance of giving phonological content to the function supplied by the L-rule.


Utrecht Lexicon of Linguistics


  • Ackema & Don 1992. Splitting morphology, Linguistics in the Netherlands 1992, pp. 1-12
  • Beard, R. 1988. On the Separation of Derivation From Morphology Toward a Lexeme/Morpheme-Based Morphology, Quaderni di Semantica a. IX, n. 1, pp.3-59
  • Beard, R. 1987. Morpheme Order in a Lexeme/Morpheme-Based Morphology, Lingua 72, pp. 1-44
  • Beard, R. 1982. Is separation natural, Studia Gramatycne VII, 119-133
  • Don, J. 1993. Morphological Conversion, PhD diss. Utrecht University.
  • Sproat, R. 1985. On Deriving the Lexicon, PhD diss. MIT.
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