Compounds are generally divided in those that involve a dependency (subordinate and attributive) relation of one constituent upon the other and those where there is coordination, for which there is much controversy on delimiting the exact borders. This article offers an overview of compounds belonging to the second type, for which the term ‘coordinative’ is adopted, as more general and neutral, drawn from a wide range of terms that have been proposed in the literature. It attempts to provide a definition on the basis of structural and semantic criteria, describes the major features of coordinative compounds and discusses crucial issues that play a significant role to their formation and meaning, such as those of headedness, the order of constituents, and compositionality. Showing that languages vary with respect to the frequency and types of coordinative compounds, being unclear in which way these constructions are distributed and used cross-linguistically, it tries to give a classification with extensive exemplification from genetically and typologically diverse languages.
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Coordination in Compounds
Coordination in Syntax
The term coordination refers to the juxtaposition of two or more conjuncts often linked by a conjunction such as and or or. The conjuncts (e.g., our friend and your teacher in Our friend and your teacher sent greetings) may be words or phrases of any type. They are a defining property of coordination, while the presence or absence of a conjunction depends on the specifics of the particular language. As a general phenomenon, coordination differs from subordination in that the conjuncts are typically symmetric in many ways: they often belong to like syntactic categories, and if nominal, each carries the same case. Additionally, if there is extraction, this must typically be out of all conjuncts in parallel, a phenomenon known as Across-the-Board extraction. Extraction of a single conjunct, or out of a single conjunct, is prohibited by the Coordinate Structure Constraint. Despite this overall symmetry, coordination does sometimes behave in an asymmetric fashion. Under certain circumstances, the conjuncts may be of unlike categories or extraction may occur out of one conjunct, but not another, thus yielding apparent violations of the Coordinate Structure Constraint. In addition, case and agreement show a wide range of complex and sometimes asymmetric behavior cross-linguistically. This tension between the symmetric and asymmetric properties of coordination is one of the reasons that coordination has remained an interesting analytical puzzle for many decades. Within the general area of coordination, a number of specific sentence types have generated much interest. One is Gapping, in which two sentences are conjoined, but material (often the verb) is missing from the middle of the second conjunct, as in Mary ate beans and John _ potatoes. Another is Right Node Raising, in which shared material from the right edge of sentential conjuncts is placed in the right periphery of the entire sentence, as in The chefs prepared __ and the customers ate __ [a very elaborately constructed dessert]. Finally, some languages have a phenomenon known as comitative coordination, in which a verb has two arguments, one morphologically plural and the other comitative (e.g., with the preposition with), but the plural argument may be understood as singular. English does not have this phenomenon, but if it did, a sentence like We went to the movies with John could be understood as John and I went to the movies.
Coordination in Syntax in the Romance Languages
Coordination exhibits unusual syntactic properties: the conjuncts need not be identical but they must obey some parallelism constraints, and their number is not limited. Romance languages have conjunctive (‘and’), disjunctive (‘or’), adversative (‘but’), and negative (‘nor’) conjunctions, some of which have a correlative use, such as (French) soit . . . soit, (Italian, Spanish) o . . . o, (Portuguese) quer . . . quer, (Romanian) sau . . . sau (‘either . . . or’). They allow coordination of clauses and phrases but also of words (French: le ou la secrétaire ‘the.m.sg or the.f.sg secretary’) and even some word parts (Italian: pre- o post-moderno ‘pre- or post-modern’). Romance languages show intricate agreement patterns in case of coordination. For number agreement, disjunctive coordination allows for total or partial agreement (Paul ou Marie viendra/viendront. ‘Paul or Mary come.fut.sg/pl’). For gender agreement, conjunctive coordination obeys gender resolution (French: un garçon et une fille gentils ‘a boy.m.sg and a girl.f.sg nice. m.pl’) or closest conjunct agreement (Spanish: El idioma y literatura rusa ‘the language.m.sg and litterature.f.sg Russian.f.sg’). Coordination may also involve nonconstituents (Italian: Darò un libro a Giovanni e un disco a Maria. ‘I’ll give a book to Giovanni and a record to Maria’) and ellipsis, such as gapping (French: Paul arrive demain et Marie aujourd’hui. ‘Paul arrives tomorrow and Mary today’), with possible mismatches between the elided material and its overt antecedent.
Copular Constructions in Syntax
Marcel den Dikken and Teresa O’Neill
Copular sentences (sentences of the form A is B) have been prominent on the research agenda for linguists and philosophers of language since classical antiquity, and continue to be shrouded in considerable controversy. Central questions in the linguistic literature on copulas and copular sentences are (a) whether predicational, specificational, identificational, and equative copular sentences have a common underlying source; and, if so, (b) how the various surface types of copular sentences are derived from that underlier; (c) whether there is a typology of copulas; and (d) whether copulas are meaningful or meaningless. The debate surrounding the postulation of multiple copular sentence types relies on criteria related to both meaning and form. Analyses based on meaning tend to focus on the question of whether or not one of the terms is a predicate of the other, whether or not the copula contributes meaning, and the information-structural properties of the construction. Analyses based on form focus on the flexibility of the linear ordering of the two terms of the construction, the surface distribution of the copular element, the restrictions imposed on the extraction of the two terms, the case and agreement properties of the construction, the omissibility of the copula or one of the two terms, and the connectivity effects exhibited by the construction. Morphosyntactic variation in the domain of copular elements is an area of research with fruitful intersections between typological and generative approaches. A variety of criteria are presented in the literature to justify the postulation of multiple copulas or underlying representations for copular sentences. Another prolific body of research concerns the semantics of copular sentences. In the assessment of scholarship on copulas and copular sentences, the article critiques the ‘multiple copulas’ approach and examines ways in which the surface variety of copular sentence types can be accounted for in a ‘single copula’ analysis. The analysis of copular constructions continues to have far-reaching consequences in the context of linguistic theory construction, particularly the question of how a predicate combines with its subject in syntactic structure.
Copulas in the Romance Languages
Definition of the copula as a discrete grammatical category is problematic. It is the semantically unmarked copulas (simple equivalents of the English verb ‘to be’) which deserve most attention in a comparison of the Romance languages; they have a typically suppletive historical morphology and are often the result of the grammaticalization of full lexical verbs, the point at which true unmarked copular status is achieved being sometimes difficult to identify. The unmarked copulas of the Ibero-Romance languages (Spanish, Portuguese, and Catalan) have the most complex distribution and have proved the most difficult to account for synchronically. The situation in the early 21st century is the consequence of a progressive encroachment of the reflexes of Latin stare and other verbs on the functions of Latin esse (reference is made to the Classical Latin form esse for convenience; however, the Romance paradigms must be taken to derive from a Vulgar Latin form *essĕre, into which other verbs, notably sedēre ‘to sit’ in the case of the Ibero-Romance languages, were suppletively incorporated). The contrastive study of the development of cognate copular verbs in closely related languages needs closer attention in regard to the identification of the parameters of copula choice with adjectival complements.
Corpus Phonology is an approach to phonology that places corpora at the center of phonological research. Some practitioners of corpus phonology see corpora as the only object of investigation; others use corpora alongside other available techniques (for instance, intuitions, psycholinguistic and neurolinguistic experimentation, laboratory phonology, the study of the acquisition of phonology or of language pathology, etc.). Whatever version of corpus phonology one advocates, corpora have become part and parcel of the modern research environment, and their construction and exploitation has been modified by the multidisciplinary advances made within various fields. Indeed, for the study of spoken usage, the term ‘corpus’ should nowadays only be applied to bodies of data meeting certain technical requirements, even if corpora of spoken usage are by no means new and coincide with the birth of recording techniques. It is therefore essential to understand what criteria must be met by a modern corpus (quality of recordings, diversity of speech situations, ethical guidelines, time-alignment with transcriptions and annotations, etc.) and what tools are available to researchers. Once these requirements are met, the way is open to varying and possibly conflicting uses of spoken corpora by phonological practitioners. A traditional stance in theoretical phonology sees the data as a degenerate version of a more abstract underlying system, but more and more researchers within various frameworks (e.g., usage-based approaches, exemplar models, stochastic Optimality Theory, sociophonetics) are constructing models that tightly bind phonological competence to language use, rely heavily on quantitative information, and attempt to account for intra-speaker and inter-speaker variation. This renders corpora essential to phonological research and not a mere adjunct to the phonological description of the languages of the world.
Creole languages have a curious status in linguistics, and at the same time they often have very low prestige in the societies in which they are spoken. These two facts may be related, in part because they circle around notions such as “derived from” or “simplified” instead of “original.” Rather than simply taking the notion of “creole” as a given and trying to account for its properties and origin, this essay tries to explore the ways scholars have dealt with creoles. This involves, in particular, trying to see whether we can define “creoles” as a meaningful class of languages. There is a canonical list of languages that most specialists would not hesitate to call creoles, but the boundaries of the list and the criteria for being listed are vague. It also becomes difficult to distinguish sharply between pidgins and creoles, and likewise the boundaries between some languages claimed to be creoles and their lexifiers are rather vague. Several possible criteria to distinguish creoles will be discussed. Simply defining them as languages of which we know the point of birth may be a necessary, but not sufficient, criterion. Displacement is also an important criterion, necessary but not sufficient. Mixture is often characteristic of creoles, but not crucial, it is argued. Essential in any case is substantial restructuring of some lexifier language, which may take the form of morphosyntactic simplification, but it is dangerous to assume that simplification always has the same outcome. The combination of these criteria—time of genesis, displacement, mixture, restructuring—contributes to the status of a language as creole, but “creole” is far from a unified notion. There turn out to be several types of creoles, and then a whole bunch of creole-like languages, and they differ in the way these criteria are combined with respect to them. Thus the proposal is made here to stop looking at creoles as a separate class, but take them as special cases of the general phenomenon that the way languages emerge and are used to a considerable extent determines their properties. This calls for a new, socially informed typology of languages, which will involve all kinds of different types of languages, including pidgins and creoles.
Critical Applied Linguistics
Critical applied linguistics is a field of inquiry and practice that connects questions of power and inequality—domination (constraining possibilities), disparity (inequitable access), discrimination (ideological exclusion), difference (cultural distinction), and desire (social preference)—to applied linguistic concerns. It brings together common applied linguistic interests such as classroom utterances, translations, conversations, genres, second-language acquisition, and media texts with critical sociological engagement with ideology, neoliberalism, colonialism, gender, racism, sexuality, and so on. While critical applied linguistics may therefore suggest certain domains of inquiry—language and migration, workplace discrimination, anti-racist education, and language revival, for example—it also insists that all domains of applied linguistics—classroom analysis, language testing, sign language interpreting, and language and the law—need to take into account the inequitable operations of the social world, and to have the theoretical and practical tools to do so effectively. Critical applied linguistics can also be understood as the intersection of a range of related critical projects, from critical pedagogy, critical literacies, and critical discourse analysis to critical approaches to language policy, critical language testing, and critical language awareness. As a domain of applied work, critical applied linguistics seeks not just to describe but also to change inequality through forms of research, pedagogy, and activism.
Critical Discourse Analysis in China: History and New Developments
Jiayu Wang and Guangyu Jin
Since critical discourse analysis (CDA) was introduced to China, it has developed into an influential field. Studies in CDA in China from the 1990s to 2020 can be delineated through four stages of development. The first stage focused on introducing the theories and concepts in CDA to China’s academia. During the second stage, CDA in China was no longer confined to reviewing theories abroad but was extended to deeper and more extensive theoretical, methodological, and empirical investigations. During the third stage, Chinese scholars in CDA became more concerned with domestic issues than in the previous stages and started to conduct interdisciplinary studies. The fourth stage marked the flourishing of CDA studies in terms of the numbers of studies published and scholars engaged in the field, and in terms of the breadth and the variety of research methods, topics, and disciplines involved. Chinese scholars tend to gear CDA to China’s social, political, and cultural contexts.
Cyclicity in Syntax
Cyclicity in syntax constitutes a property of derivations in which syntactic operations apply bottom-up in the production of ever larger constituents. The formulation of a principle of grammar that guarantees cyclicity depends on whether structure is built top-down with phrase structure rules or bottom-up with a transformation Merge. Considerations of minimal and efficient computation motivate the latter, as well as the formulation of the cyclic principle as a No Tampering Condition on structure-building operations (Section 3.3) without any reference to special cyclic domains in which operations apply (as in the formulation of the Strict Cycle Condition (Section 2) and its predecessors (Section 1)) or any reference to extending a phrase marker (the Extension Condition (Section 3)). Ultimately, the empirical effects of a No Tampering Condition on structure building, which conform to strict cyclicity, follow from the formulation of the Merge operation as strictly binary. This leaves as open questions whether displacement (movement) must involve covert intermediate steps (successive cyclic movement) and whether derivations of the two separate interface representations (Phonetic Form and Logical Form) occur in parallel as a single cycle.
Dalmatian is an extinct group of Romance varieties spoken on the eastern Adriatic seaboard, best known from its Vegliote variety, spoken on the island of Krk (also called Veglia). Vegliote is principally represented by the linguistic testimony of its last speaker, Tuone Udaina, who died at the end of the 19th century. By the time Udaina’s Vegliote could be explored by linguists (principally by Matteo Bartoli), it seems that he had no longer actively spoken the language for decades, and his linguistic testimony is imperfect, in that it is influenced for example by the Venetan dialect that he habitually spoke. Nonetheless, his Vegliote reveals various distinctive and recurrent linguistic traits, notably in the domain of phonology (for example, pervasive and complex patterns of vowel diphthongization) and morphology (notably a general collapse of the general Romance inflexional system of tense and mood morphology, but also an unusual type of synthetic future form).
Eva Skafte Jensen
Danish is a North Germanic language, spoken by approximately 6 million people. Genealogically, it is related to the other Germanic languages, in particular the other North Germanic languages (Swedish, Norwegian, Icelandic, Faroese), but also, for example, German, Dutch, and English; typologically, Modern Danish is closer to Norwegian and Swedish than to any other language. Historically deriving from Proto-Germanic, Danish morphology once had three grammatical genders (the masculine, the feminine, and the neuter) and case inflection (nominative, accusative, dative, and genitive) in all nominal words; it also had inflection for mood, tense, number, and person in the verbal conjugations. In Modern Standard Danish, much of the traditional nominal and verbal inflection has disappeared. Instead, other kinds of morphosyntactic constructions and structures have emerged. Middle Danish and Modern Danish are typologically very different languages. One of the structural innovations linked to the typological change is that a syntactic subject becomes obligatory in Danish sentences. Correlated to this, Danish develops expletive constructions with det ‘it’ and der ‘there’. Another important point differentiating Middle Danish from Modern Danish concerns agreement. Traditional Indo-European agreement (verbal as well as nominal) has receded in favor of more fixed word order, both on the sentence level and internally within phrases. As part of this, Modern Danish has developed a set of definite and indefinite articles. The traditional three genders are reduced to two (common and neuter) and have developed new syntactic-semantic functions alongside the traditional lexically distributed functions. In the verbal systems, Danish makes use of two different kinds of passive voice (a periphrastic and an inflected one), which carry different meanings, and also of two different auxiliaries in perfective constructions, that is, have ‘have’ and være ‘be’, the latter doubling as an auxiliary in periphrastic passive constructions. Perfective constructions are made up by an auxiliary and the supine form of the main verb. Danish is a V2-language with a relatively fixed word order, often depicted in the form of the so-called sentence frame, a topological model designed specifically for Danish. Like most other Germanic languages, Danish has a rich set of modal particles. All these morphosyntactic features, Danish shares with Swedish and Norwegian, but the distribution is not completely identical in the three languages, something that makes the Mainland Scandinavian languages an interesting study object to the typologically interested linguist. Exclusive for Danish is the so-called stød, a suprasegmental prosodic feature, used as a distinctive feature. Modern Danish is strongly standardized with only little of the traditional dialectal variation left. From the end of the 20th century, in the larger cities, new sociolects have emerged, that is, multi-ethnolects. The new multi-ethnolects are based on a substrate of Danish with lexical features from the languages of Central Asia, the Middle East, and Africa. In addition to the lexical innovations, the multi-ethnolects are characteristic in intonation patterns different from Standard Danish, and they have morphosyntactic features different from Standard Danish, for example, in word order and in the use of gender.
Defectiveness in Morphology
Morphological defectiveness refers to situations where one or more paradigmatic forms of a lexeme are not realized, without plausible syntactic, semantic, or phonological causes. The phenomenon tends to be associated with low-frequency lexemes and loanwords. Typically, defectiveness is gradient, lexeme-specific, and sensitive to the internal structure of paradigms. The existence of defectiveness is a challenge to acquisition models and morphological theories where there are elsewhere operations to materialize items. For this reason, defectiveness has become a rich field of research in recent years, with distinct approaches that view it as an item-specific idiosyncrasy, as an epiphenomenal result of rule competition, or as a normal morphological alternation within a paradigmatic space.
Degree Expressions in Chinese
Degree expressions in natural language reflect how human cognition performs abstract tasks like taking measurements (i.e., mapping items to degrees on a certain scale) and conducting comparisons between measurements. There is a great variation on how different languages encode notions like degrees and scales and operate comparison, inspiring ongoing theoretical development in degree semantics. This article presents major empirical data on degree expressions in Mandarin Chinese and surveys current research on Chinese-specific phenomena. Compared to well-known English phenomena, Chinese gradable predicates like 高gāo ‘tall, high’ seem rather syntactic-category-fluid, and due to the lack of comparative morphemes, their interpretation can be ambiguous between a comparative use and a positive/measurement interpretation. Typical degree expressions in Chinese, including the positive use, comparatives, equatives, and measurement constructions, demonstrate patterns different from those in English. Moreover, not only adjective-like words such as 高gāo ‘tall, high’, but also property nouns (e.g., 魅力mèi-lì ‘charm’, 钱qián ‘money’) and mental verbs (e.g., 喜欢xǐ-huān ‘like’) have gradable meanings and can be used to form degree expressions. With regard to these empirical phenomena, this article focuses on the following fundamental research questions in the literature: (a) The encoding of comparison: In a language lacking comparative morphemes, how is the distinction established between the positive and the comparative interpretation? (b) Compositional derivation: How are Chinese comparatives distinct from well-studied English clausal comparatives? (c) Ontology of degrees: How do various Chinese degree expressions reveal the underlying ontological assumptions of scales and degrees? Even though many of the research questions are still hotly debated in the existing literature, research on Chinese empirical data already brings profound implications for theoretical development of degree semantics. In particular, this article suggests a new look at variations between languages with versus without overt comparative morphemes (e.g., English -er) and invites more research on the pragmatics involved in cross-linguistic degree expressions.
Deixis and Pragmatics
William F. Hanks
Deictic expressions, like English ‘this, that, here, and there’ occur in all known human languages. They are typically used to individuate objects in the immediate context in which they are uttered, by pointing at them so as to direct attention to them. The object, or demonstratum is singled out as a focus, and a successful act of deictic reference is one that results in the Speaker (Spr) and Addressee (Adr) attending to the same referential object. Thus, (1)A:Oh, there’s that guy again (pointing)B:Oh yeah, now I see him (fixing gaze on the guy) (2)A:I’ll have that one over there (pointing to a dessert on a tray)B:This? (touching pastry with tongs)A:yeah, that looks greatB:Here ya’ go (handing pastry to customer) In an exchange like (1), A’s utterance spotlights the individual guy, directing B’s attention to him, and B’s response (both verbal and ocular) displays that he has recognized him. In (2) A’s utterance individuates one pastry among several, B’s response makes sure he’s attending to the right one, A reconfirms and B completes by presenting the pastry to him. If we compare the two examples, it is clear that the underscored deictics can pick out or present individuals without describing them. In a similar way, “I, you, he/she, we, now, (back) then,” and their analogues are all used to pick out individuals (persons, objects, or time frames), apparently without describing them. As a corollary of this semantic paucity, individual deictics vary extremely widely in the kinds of object they may properly denote: ‘here’ can denote anything from the tip of your nose to planet Earth, and ‘this’ can denote anything from a pastry to an upcoming day (this Tuesday). Under the same circumstance, ‘this’ and ‘that’ can refer appropriately to the same object, depending upon who is speaking, as in (2). How can forms that are so abstract and variable over contexts be so specific and rigid in a given context? On what parameters do deictics and deictic systems in human languages vary, and how do they relate to grammar and semantics more generally?
Dene-Yeniseian is a proposed genealogical link between the widespread North American language family Na-Dene (Athabaskan, Eyak, Tlingit) and Yeniseian in central Siberia, represented today by the critically endangered Ket and several documented extinct relatives. The Dene-Yeniseian hypothesis is an old idea, but since 2006 new evidence supporting it has been published in the form of shared morphological systems and a modest number of lexical cognates showing interlocking sound correspondences. Recent data from human genetics and folklore studies also increasingly indicate the plausibility of a prehistoric (probably Late Pleistocene) connection between populations in northwestern North America and the traditionally Yeniseian-speaking areas of south-central Siberia. At present, Dene-Yeniseian cannot be accepted as a proven language family until the purported evidence supporting the lexical and morphological correspondences between Yeniseian and Na-Dene is expanded and tested by further critical analysis and their relationship to Old World families such as Sino-Tibetan and Caucasian, as well as the isolate Burushaski (all earlier proposed as relatives of Yeniseian, and sometimes also of Na-Dene), becomes clearer.
Denominal Verbs in Morphology
Denominal verbs are verbs formed from nouns by means of various word-formation processes such as derivation, conversion, or less common mechanisms like reduplication, change of pitch, or root and pattern. Because their well-formedness is determined by morphosyntactic, phonological, and semantic constraints, they have been analyzed from a variety of lexicalist and non-lexicalist perspectives, including Optimality Theory, Lexical Semantics, Cognitive Grammar, Onomasiology, and Neo-Construction Grammar. Independently of their structural shape, denominal verbs have in common that they denote events in which the referents of their base nouns (e.g., computer in the case of computerize) participate in a non-arbitrary way. While traditional labels like ‘ornative’, ‘privative’, ‘locative’, ‘instrumental’ and the like allow for a preliminary classification of denominal verbs, a more formal description has to account for at least three basic aspects, namely (1) competition among functionally similar word-formation patterns, (2) the polysemy of affixes, which precludes a neat one-to-one relation between derivatives displaying a particular affix and a particular semantic class, and (3) the relevance of generic knowledge and contextual information for the interpretation of (innovative) denominal verbs.
Deponency in Morphology
Deponency refers to mismatches between morphological form and syntactic function (or “meaning”), such that a given morphological exponent appears in a syntactic environment that is unexpected from the point of view of its canonical (“normal” or “expected”) function. This phenomenon takes its name from Latin, where certain morphologically “passive” verbs appear in syntactically active contexts (for example, hort-or ‘I encourage’, with the same ending as passive am-or ‘I am loved’), but it occurs in other languages as well. Moreover, the term has been extended to include mismatches in other domains, such as number mismatches in nominal morphology or tense mismatches on verbs (e.g., in the Germanic preterite-presents). Theoretical treatments of deponency vary from seeking a unified (and uniform) account of all observed mismatches to arguing that the wide range of cross-linguistically attested form-function mismatches does not form a natural class and does not require explanatory devices specific to the domain of morphology. It has also been argued that some apparent mismatches are “spurious” and have been misanalyzed. Nevertheless, it is generally agreed across frameworks that however such “morphological mismatches” are to be analyzed, deponency has potential ramifications for theories of the syntax-morphology interface and (depending on one’s theoretical approach) the structure of the lexicon.
Derivational Economy in Syntax and Semantics
Željko Bošković and Troy Messick
Economy considerations have always played an important role in the generative theory of grammar. They are particularly prominent in the most recent instantiation of this approach, the Minimalist Program, which explores the possibility that Universal Grammar is an optimal way of satisfying requirements that are imposed on the language faculty by the external systems that interface with the language faculty which is also characterized by optimal, computationally efficient design. In this respect, the operations of the computational system that produce linguistic expressions must be optimal in that they must satisfy general considerations of simplicity and efficient design. Simply put, the guiding principles here are (a) do something only if you need to and (b) if you do need to, do it in the most economical/efficient way. These considerations ban superfluous steps in derivations and superfluous symbols in representations. Under economy guidelines, movement takes place only when there is a need for it (with both syntactic and semantic considerations playing a role here), and when it does take place, it takes place in the most economical way: it is as short as possible and carries as little material as possible. Furthermore, economy is evaluated locally, on the basis of immediately available structure. The locality of syntactic dependencies is also enforced by minimal search and by limiting the number of syntactic objects and the amount of structure accessible in the derivation. This is achieved by transferring parts of syntactic structure to the interfaces during the derivation, the transferred parts not being accessible for further syntactic operations.
Derivational morphology is a type of word formation that creates new lexemes, either by changing syntactic category or by adding substantial new meaning (or both) to a free or bound base. Derivation may be contrasted with inflection on the one hand or with compounding on the other. The distinctions between derivation and inflection and between derivation and compounding, however, are not always clear-cut. New words may be derived by a variety of formal means including affixation, reduplication, internal modification of various sorts, subtraction, and conversion. Affixation is best attested cross-linguistically, especially prefixation and suffixation. Reduplication is also widely found, with various internal changes like ablaut and root and pattern derivation less common. Derived words may fit into a number of semantic categories. For nouns, event and result, personal and participant, collective and abstract noun are frequent. For verbs, causative and applicative categories are well-attested, as are relational and qualitative derivations for adjectives. Languages frequently also have ways of deriving negatives, relational words, and evaluatives. Most languages have derivation of some sort, although there are languages that rely more heavily on compounding than on derivation to build their lexical stock. A number of topics have dominated the theoretical literature on derivation, including productivity (the extent to which new words can be created with a given affix or morphological process), the principles that determine the ordering of affixes, and the place of derivational morphology with respect to other components of the grammar. The study of derivation has also been important in a number of psycholinguistic debates concerning the perception and production of language.