Selection (linguistics)

In linguistics, selection denotes the ability of predicates to determine the semantic content of their arguments. Predicates select their arguments, which means they limit the semantic content of their arguments. One sometimes draws a distinction between types of selection; one acknowledges both ''s(emantic)-selection'' and ''c(ategory)-selection''. Selection in general stands in contrast to subcategorization: predicates both select and subcategorize for their complement arguments, whereas they only select their subject arguments. Selection is a semantic concept, whereas subcategorization is a syntactic one. Selection is closely related to valency, a term used in other grammars than the Chomskian generative grammar, for a similar phenomenon.

Examples

The following pairs of sentences will illustrate the concept of selection:

::a. The plant is wilting.
::b. #The building is wilting. - The argument ''the building'' violates the selectional restrictions of the predicate ''is wilting''.

::a. Sam drank a coffee.
::b. #Sam drank a car. - The argument ''a car'' contradicts the selectional restrictions of the predicate ''drank''.

The # indicates semantic deviance. The predicate ''is wilting'' selects a subject argument that is a plant or is plant-like. Similarly, the predicate ''drank'' selects an object argument that is a liquid or is liquid-like. A building cannot normally be understood as wilting, just as a car cannot normally be interpreted as a liquid. The b-sentences are possible only given an unusual context that establishes appropriate metaphorical meaning. The deviance of the b-sentences is addressed in terms of selection. The selectional restrictions of the predicates ''is wilting'' and ''drank'' are violated.

When a mismatch between a selector and a selected element triggers reinterpretation of the meaning of those elements, that process is referred to as coercion.

S-selection vs. c-selection

One sometimes encounters the terms ''s(emantic)-selection'' and ''c(ategory)-selection''. The concept of c-selection overlaps to an extent with subcategorization. Predicates c-select the syntactic category of their complement arguments - e.g. noun (phrase), verb (phrase), adjective (phrase), etc. - i.e. they determine the syntactic category of their complements. In contrast, predicates s-select the semantic content of their arguments. Thus s-selection is a semantic concept, whereas c-selection is a syntactic one. When the term ''selection'' or ''selectional restrictions'' appears alone without the ''c-'' or ''s-'', s-selection is usually understood.

The b-sentences above do not contain violations of the c-selectional restrictions of the predicates ''is wilting'' and ''drank''; they are, rather, well-formed from a syntactic point of view (hence #, not *), for the arguments ''the building'' and ''a car'' satisfy the c-selectional restrictions of their respective predicates, these restrictions requiring their arguments to be nouns or noun phrases. Just the s-selectional restrictions of the predicates ''is wilting'' and ''drank'' are violated in the b-sentences.

''Selectional constraints'' or ''selectional preferences'' describe the degree of s-selection, in contrast to ''selectional restrictions'' which treat s-selection as a binary, yes or no. Selectional preferences have often been used as a source of linguistic information in natural language processing applications. ''Thematic fit'' is a measure of how much a particular word in a particular role (like subject or direct object) matches the selectional preference of a particular predicate. For example, the word ''cake'' has a high thematic fit as a direct object for ''cut''.

C-selection vs. subcategorization

The concepts of c-selection and subcategorization overlap in meaning and use to a significant degree. If there is a difference between these concepts, it resides with the status of the subject argument. Traditionally, predicates are interpreted as NOT subcategorizing for their subject argument because the subject argument appears outside of the minimal VP containing the predicate. Predicates do, however, c-select their subject arguments, e.g.

::Fred eats beans.

The predicate ''eats'' c-selects both its subject argument ''Fred'' and its object argument ''beans'', but as far as subcategorization is concerned, ''eats'' subcategorizes for its object argument ''beans'' only. This difference between c-selection and subcategorization depends crucially on the understanding of subcategorization. An approach to subcategorization that sees predicates as subcategorizing for their subject arguments as well as for their object arguments will draw no distinction between c-selection and subcategorization; the two concepts are synonymous for such approaches.

Thematic relations

Selection can be closely associated with thematic relations (e.g. agent, patient, theme, goal, etc.).Concerning the connection between selection and thematic relations/roles, see Ouhalla (125). By limiting the semantic content of their arguments, predicates are determining the thematic relations/roles that their arguments bear.

Theories

Several linguistic theories make explicit use of selection. These include:
* Operator grammar, which makes selection a central part of the theory.
* Link grammar, which assigns a (floating point) log-likelihood "cost" to each context a word can appear in, thus providing an explicit numeric estimate of the likelihood of a parse.

Notes

{{Reflist, 2

Literature

*Brinton, L. 2000
The structure of modern English
Amsterdam:John Benjamins Publishing Company.
*Carnie, A. 2007
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2nd edition. Malden, MA: Blackwell Publishing.
*Chisholm, W. 1981. Elements of English linguistics. New York: Longman.
*Chomsky, N. 1965
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Cambridge, MA: MIT Press.
*Cowper, E. 1992
A concise introduction to syntactic theory: The government-binding approach
Chicago: The University of Chicago Press.
*Fowler, R. 1971. An introduction to transformational syntax. London: Routledge & Kegan Paul.
*Fromkin, V. (ed.). 2000
Linguistics: An introduction to linguistic theory
Malden, MA: Blackwell Publishers.
*Haegeman, L. and J. Guéron. 1999. English grammar: A generative perspective. Oxford, UK: Oxford University Press.
*Horrocks, G. 1986. Generative Grammar. Longman: London.
*Napoli, D. 1993. Syntax: Theory and problems. New York: Oxford University Press.
*Ouhalla, J. 1994. Transformational grammar: From rules to principles and parameters. London: Edward Arnold.
*van Riemsdijk, H. and E. Williams. 1986. Introduction to the theory of grammar. Cambridge, MA: The MIT Press.
*van Valin, R. 2001. An introduction to syntax. Cambridge, UK: Cambridge University Press.

Grammar
Generative syntax
Semantics