Summary and Keywords
Natural Morphology (NM) is a functionalist theory that aims to account for morphological preferences on the basis of extralinguistic motivations. It is hierarchically structured in three (partially conflicting) subtheories. The first subtheory of universal naturalness (markedness) focuses on cognitive and semiotic principles such as transparency, iconicity, and bi-uniqueness, which are modeled in terms of parametric relations. Within the second subtheory of typological naturalness (or adequacy), choices on the universal preference parameters are coordinated among themselves. The third subtheory of language-specific naturalness (also called language adequacy) elaborates on what is normal in the potential system of a specific language. NM also puts special emphasis on the interface of morphology with other linguistic and nonlinguistic components, opening thereby the new fields of morphopragmatics, morphonotactics (as a special part of morphonology), and extragrammatical morphology. A range of gradual clines are designed to assess not only transitions between adjacent components of grammar, but also within morphology between compounding, derivation, and inflection and for notions such as regularity–subregularity–irregularity/suppletion, degrees of productivity or number of headedness criteria. Theoretical constructs are supported by ample external evidence, especially from diachrony and psycholinguistics.
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