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Article

Paradigm Function Morphology (PFM) is an evolving approach to modeling morphological systems in a precise and enlightening way. The fundamental insight of PFM is that words have both content and form and that in the context of an appropriately organized lexicon, a language’s morphology deduces a complex word’s form from its content. PFM is therefore a realizational theory: a language’s grammar and lexicon are assumed to provide a precise characterization of a word’s content, from which the language’s morphology then projects the corresponding form. Morphemes per se have no role in this theory; by contrast, paradigms have the essential role of defining the content that is realized by a language’s morphology. At the core of PFM is the notion of a paradigm function, a formal representation of the relation between a word’s content and its form; the definition of a language’s paradigm function is therefore the definition of its inflectional morphology. Recent elaborations of this idea assume a distinction between content paradigms and form paradigms, which makes it possible to account for a fact that is otherwise irreconcilable with current morphological theory—the fact that the set of morphosyntactic properties that determines a word’s syntax and semantics often differs from the set of properties (some of them morphomic) that determines a word’s inflectional form. Another recent innovation is the assumption that affixes and rules of morphology may be complex in the sense that they may be factored into smaller affixes and rules; the evidence favoring this assumption is manifold.

Article

Pronouns are words that represent morphosyntactic features of nominal referents located somewhere else in the sentence or the context. They display the highest degree of morphosyntactic exponence in the nominal domain, including features of person, gender, number, case, animacy, and social relationship. The Germanic languages make use of a common set of pronoun roots in order to form the paradigms of demonstrative, personal, reflexive, interrogative, and indefinite pronouns. Selection and inflection are language specific: for example, the Germanic demonstrative pronoun root *þat developed to the uninflected distal demonstrative that in English, while in German it forms part of the inflectional paradigm of the proximal demonstrative der, die, das. Reciprocal, relative, and possessive pronouns do not have autonomous roots; their forms are derived from the previously mentioned classes; compare the English relative pronouns that (< demonstrative), what, who, whose, which (< interrogative). Suppletion occurs in many paradigms, especially with person features, for example, English first person I, second person you. The 13 Germanic standard languages, Icelandic, Faroese, German, Luxembourgish, Yiddish, Danish, Swedish, Bokmål, Nynorsk, Dutch, Frisian, English, and Afrikaans, form a continuum in which Icelandic is closest to the Germanic roots and has most distinctions while Afrikaans has the least. Often the paradigm structure mirrors the geographical subdivision in Scandinavian and West Germanic. However, in some aspects German (and Luxembourgish, Yiddish) cluster with Insular Scandinavian while Mainland Scandinavian is structurally closer to the rest of the West Germanic languages. Adnominal usage of pronouns and their usage as independent constituents is only in rare cases morphologically distinguished, for example, English adnominal possessive your versus independent pronouns yours.

Article

Gregory Stump

Inflection is the systematic relation between words’ morphosyntactic content and their morphological form; as such, the phenomenon of inflection raises fundamental questions about the nature of morphology itself and about its interfaces. Within the domain of morphology proper, it is essential to establish how (or whether) inflection differs from other kinds of morphology and to identify the ways in which morphosyntactic content can be encoded morphologically. A number of different approaches to modeling inflectional morphology have been proposed; these tend to cluster into two main groups, those that are morpheme-based and those that are lexeme-based. Morpheme-based theories tend to treat inflectional morphology as fundamentally concatenative; they tend to represent an inflected word’s morphosyntactic content as a compositional summing of its morphemes’ content; they tend to attribute an inflected word’s internal structure to syntactic principles; and they tend to minimize the theoretical significance of inflectional paradigms. Lexeme-based theories, by contrast, tend to accord concatenative and nonconcatenative morphology essentially equal status as marks of inflection; they tend to represent an inflected word’s morphosyntactic content as a property set intrinsically associated with that word’s paradigm cell; they tend to assume that an inflected word’s internal morphology is neither accessible to nor defined by syntactic principles; and they tend to treat inflection as the morphological realization of a paradigm’s cells. Four important issues for approaches of either sort are the nature of nonconcatenative morphology, the incidence of extended exponence, the underdetermination of a word’s morphosyntactic content by its inflectional form, and the nature of word forms’ internal structure. The structure of a word’s inventory of inflected forms—its paradigm—is the locus of considerable cross-linguistic variation. In particular, the canonical relation of content to form in an inflectional paradigm is subject to a wide array of deviations, including inflection-class distinctions, morphomic properties, defectiveness, deponency, metaconjugation, and syncretism; these deviations pose important challenges for understanding the interfaces of inflectional morphology, and a theory’s resolution of these challenges depends squarely on whether that theory is morpheme-based or lexeme-based.

Article

The Word and Paradigm approach to morphology associates lexemes with tables of surface forms for different morphosyntactic property sets. Researchers express their realizational theories, which show how to derive these surface forms, using formalisms such as Network Morphology and Paradigm Function Morphology. The tables of surface forms also lend themselves to a study of the implicative theories, which infer the realizations in some cells of the inflectional system from the realizations of other cells. There is an art to building realizational theories. First, the theories should be correct, that is, they should generate the right surface forms. Second, they should be elegant, which is much harder to capture, but includes the desiderata of simplicity and expressiveness. Without software to test a realizational theory, it is easy to sacrifice correctness for elegance. Therefore, software that takes a realizational theory and generates surface forms is an essential part of any theorist’s toolbox. Discovering implicative rules that connect the cells in an inflectional system is often quite difficult. Some rules are immediately apparent, but others can be subtle. Software that automatically analyzes an entire table of surface forms for many lexemes can help automate the discovery process. Researchers can use Web-based computerized tools to test their realizational theories and to discover implicative rules.

Article

Antonio Fábregas

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.

Article

Switch reference is a grammaticalized system for marking continuity or discontinuity of reference between two clauses. It is therefore not surprising that switch reference has received a lot of attention from syntacticians. From the syntactic discussions of switch reference, it has become clear that switch reference is far from a unified phenomenon, as it seems to range between a strictly syntactic system in some languages and a pragmatically driven marker of discourse cohesion in others. Switch reference involves the marking of (dis)continuity, and switch reference markers are more often than not morphological units. This means that, apart from the syntactic side, switch reference has a morphological side as well. The morphology of switch reference has received far less attention than its syntax and semantics. Although there are clear tendencies with respect to the morphological characteristics of switch reference markers (they tend to be inflectional suffixes that take a verb as their host), their characteristics are by no means uniform across languages. Switch reference is not always clearly an inflectional category, nor is it always expressed strictly morphologically, but rather by clitics or phonologically free words. Languages may furthermore have dedicated switch reference marking, but in many cases, switch reference is expressed in combination with other categories sharing the exponent. Paradigms of switch reference markers may show several types of asymmetries, whether to do with markedness, (co-)exponence, or different morphosyntactic behavior. A possible reason for the diversity found in switch reference markers, sometimes within the same language, may be the diverse origins of the markers: they may for instance stem from gapping structures, nonfinite verb morphology, pronouns, deictic elements, conjunction markers, or case markers.

Article

It is uncontroversial that morphological processes can change phonological surface representations. However, some empirical evidence also suggests that morphological processes may trigger phonetically gradient processes, that is, processes that involve fine phonetic differences, but involve no change in phonological categories. Such findings challenge modular or discrete feedforward theories of grammatical architecture, which counterpredict direct interactions between morphology and phonetics. This article reviews some of the findings in this area, pointing to two types of difficulty in interpreting evidence of morphologically-conditioned phonetic gradience. The first one involves significance and replicability in experimental sciences, which become especially problematic when fine phonetic detail is examined and the magnitude of differences involved is very small. The second one concerns identifying what is causing the phonetic effects among a wealth of possibilities, including paradigmatic relationships, morphological structure, prosody, and informativity.

Article

Petar Milin and James P. Blevins

Studies of the structure and function of paradigms are as old as the Western grammatical tradition. The central role accorded to paradigms in traditional approaches largely reflects the fact that paradigms exhibit systematic patterns of interdependence that facilitate processes of analogical generalization. The recent resurgence of interest in word-based models of morphological processing and morphological structure more generally has provoked a renewed interest in paradigmatic dimensions of linguistic structure. Current methods for operationalizing paradigmatic relations and determining the behavioral correlates of these relations extend paradigmatic models beyond their traditional boundaries. The integrated perspective that emerges from this work is one in which variation at the level of individual words is not meaningful in isolation, but rather guides the association of words to paradigmatic contexts that play a role in their interpretation.

Article

Nowadays, computer models of human language are instrumental to millions of people, who use them every day with little if any awareness of their existence and role. Their exponential development has had a huge impact on daily life through practical applications like machine translation or automated dialogue systems. It has also deeply affected the way we think about language as an object of scientific inquiry. Computer modeling of Romance languages has helped scholars develop new theoretical frameworks and new ways of looking at traditional approaches. In particular, computer modeling of lexical phenomena has had a profound influence on some fundamental issues in human language processing, such as the purported dichotomy between rules and exceptions, or grammar and lexicon, the inherently probabilistic nature of speakers’ perception of analogy and word internal structure, and their ability to generalize to novel items from attested evidence. Although it is probably premature to anticipate and assess the prospects of these models, their current impact on language research can hardly be overestimated. In a few years, data-driven assessment of theoretical models is expected to play an irreplaceable role in pacing progress in all branches of language sciences, from typological and pragmatic approaches to cognitive and formal ones.

Article

Ljuba N. Veselinova

The term suppletion is used to indicate the unpredictable encoding of otherwise regular semantic or grammatical relations. Standard examples in English include the present and past tense of the verb go, cf. go vs. went, or the comparative and superlative forms of adjectives such as good or bad, cf. good vs. better vs. best, or bad vs. worse vs. worst. The complementary distribution of different forms to express a paradigmatic contrast has been noticed already in early grammatical traditions. However, the idea that a special form would supply missing forms in a paradigm was first introduced by the neogrammarian Hermann Osthoff, in his work of 1899. The concept of suppletion was consolidated in modern linguistics by Leonard Bloomfield, in 1926. Since then, the notion has been applied to both affixes and stems. In addition to the application of the concept to linguistic units of varying morpho-syntactic status, such as affixes, or stems of different lexical classes such as, for instance, verbs, adjectives, or nouns, the student should also be prepared to encounter frequent discrepancies between uses of the concept in the theoretical literature and its application in more descriptively oriented work. There are models in which the term suppletion is restricted to exceptions to inflectional patterns only; consequently, exceptions to derivational patterns are not accepted as instantiations of the phenomenon. Thus, the comparative degrees of adjectives will be, at best, less prototypical examples of suppletion. Treatments of the phenomenon vary widely, to the point of being complete opposites. A strong tendency exists to regard suppletion as an anomaly, a historical artifact, and generally of little theoretical interest. A countertendency is to view the phenomenon as challenging, but nonetheless very important for adequate theory formation. Finally, there are scholars who view suppletion as a functionally motivated result of language change. For a long time, the database on suppletion, similarly to many other phenomena, was restricted to Indo-European languages. With the solidifying of wider cross-linguistic research and linguistic typology since the 1990s, the database on suppletion has been substantially extended. Large-scale cross-linguistic studies have shown that the phenomenon is observed in many different languages around the globe. In addition, it appears as a systematic cross-linguistic phenomenon in that it can be correlated with well-defined language areas, language families, specific lexemic groups, and specific slots in paradigms. The latter can be shown to follow general markedness universals. Finally, the lexemes that show suppletion tend to have special functions in both lexicon and grammar.

Article

Olaf Koeneman and Hedde Zeijlstra

Many, and according to some estimates most, of the world’s languages allow the subject of the sentence to be unexpressed, a phenomenon known as ‘pro(noun) drop’. In a language like Italian, Gianni parla ‘Gianni speaks’ and Parla ‘(S)he speaks’ are both grammatical sentences. This is in contrast to a language like English, in which not expressing the subject leads to an ungrammatical sentence: *Speaks. The difference between being and not being able to leave the subject unexpressed (or, to put it differently, to have a ‘null subject’) has been related to the richness of the verbal paradigm of a language. Whereas Italian has six different agreement endings in the present tense, English only marks the third-person singular differently (with an -s affix, as in John speak-s). Although this correlation with rich agreement is pervasive, it does not successfully capture all the cross-linguistic variation that is attested. Languages like Japanese and Chinese, for instance, allow unexpressed arguments (including subjects) in the absence of any agreement. For these languages, it has been observed that their pronominal paradigms tend to have transparent, agglutinative nominal morphology, expressing case or number features. Trickier perhaps are languages that allow pro drop under certain conditions only. Some languages, such as Finnish or colloquial variants of German, allow it in certain but not all person/number contexts. Other languages, such as Icelandic, allow the subject to be unexpressed only if it is an expletive, the counterpart of English it (cf. It is raining) or there (There is a man in the garden). For these so-called partial pro drop languages, it is still unclear if one can relate their more restricted absence of overt subjects to other observable properties that they possess.

Article

Allomorphy and syncretism are both deviations from the one-to-one relationship between form and meaning inside the linguistic sign as postulated by Saussure as well as from the ideal of inflectional morphology as stipulated in the canonical approach by Corbett. Instances of both phenomena are well documented in all Romance languages. In inflection, allomorphy refers to the use of more than one root/stem in the paradigm of a single lexeme or to the existence of more than one inflectional affix for the same function. Syncretism describes the existence of identical forms with different functions in one and the same paradigm. Verbs exhibiting stem allomorphy are traditionally called irregular, a label that describes the existence of unexpected and, sometimes, unpredictable forms from a learner’s perspective. Extreme forms of allomorphy are called suppletion, for which traditional accounts require two or more etymologically unrelated roots/stems to coexist within the paradigm of a single lexeme. Allomorphy often originates in sound change affecting only stems in a certain phonological environment. When the phonological conditioning of the stem allomorph disappears, which is frequently the case, its distribution within the paradigm may become purely morphological, thus constituting a morphome in the sense of Aronoff. Recurrent patterns of syncretism may also be considered morphomes. Whereas syncretism was quite rare in Latin verb morphology, Romance languages feature it to much greater, if different, degrees. In extreme cases, syncretism patterns become paradigm-structuring in many Gallo-Romance varieties, as is the case in the verb morphology of standard French, where almost all forms are syncretic with at least one other.

Article

The Romance languages inherited from Latin a system of four inflection classes in verbs featuring a dedicated theme vowel (or its absence). The presence of the theme vowel in inflectional forms differs from language to language and from inflection class to inflection class. In Latin, the theme vowels are found in most forms; in Romance, their presence has declined but they are still featured at least in the infinitive of most inflection classes. Most Romance languages simplified the Latin system by reducing the number of inflection classes while retaining the class distinction by theme vowels. In many Romance languages, new inflection classes have evolved. The existence of verbs with a stem-forming augment is often described as a subclass in traditional grammars. But the augment appears in a well-defined set of paradigm cells warranting the introduction of a new class. In a synchronic analysis, French and Oïl varieties show mostly a distinction based on length of the stem or, from another perspective, pattern of syncretism as many forms are homophonous. This is partly due to the fact that some very frequent forms do not feature any longer inflectional suffixes in their phonetic realization (although these are retained in spelling). New irregularities in the stem found in all Romance languages suggest the emergence of an additional class distinction based on the form, number, and distribution of the stems. Morphomic patterns arose which may be interpreted as inflection classes. The most radical change took place in French: Some analyses claim that none of the traditional classes distinguished by theme vowels survives; only stem distinctions may be used to establish inflection classes. Other studies still assume theme vowels in French, at least with verbs ending in -ir in the infinitive. Suppletion or other processes may lead to heteroclisis (i.e., forms of the same verb pertaining to different inflection classes).

Article

Natsuko Tsujimura

The rigor and intensity of investigation on Japanese in modern linguistics has been particularly noteworthy over the past 50 years. Not only has the elucidation of the similarities to and differences from other languages properly placed Japanese on the typological map, but Japanese has served as a critical testing area for a wide variety of theoretical approaches. Within the sub-fields of Japanese phonetics and phonology, there has been much focus on the role of mora. The mora constitutes an important timing unit that has broad implications for analysis of the phonetic and phonological system of Japanese. Relatedly, Japanese possesses a pitch-accent system, which places Japanese in a typologically distinct group arguably different from stress languages, like English, and tone languages, like Chinese. A further area of intense investigation is that of loanword phonology, illuminating the way in which segmental and suprasegmental adaptations are processed and at the same time revealing the fundamental nature of the sound system intrinsic to Japanese. In morphology, a major focus has been on compounds, which are ubiquitously found in Japanese. Their detailed description has spurred in-depth discussion regarding morphophonological (e.g., Rendaku—sequential voicing) and morphosyntactic (e.g., argument structure) phenomena that have crucial consequences for morphological theory. Rendaku is governed by layers of constraints that range from segmental and prosodic phonology to structural properties of compounds, and serves as a representative example in demonstrating the intricate interaction of the different grammatical aspects of the language. In syntax, the scrambling phenomenon, allowing for the relatively flexible permutation of constituents, has been argued to instantiate a movement operation and has been instrumental in arguing for a configurational approach to Japanese. Japanese passives and causatives, which are formed through agglutinative morphology, each exhibit different types: direct vs. indirect passives and lexical vs. syntactic causatives. Their syntactic and semantic properties have posed challenges to and motivations for a variety of approaches to these well-studied constructions in the world’s languages. Taken together, the empirical analyses of Japanese and their theoretical and conceptual implications have made a tremendous contribution to linguistic research.

Article

Andrew Hippisley

The morphological machinery of a language is at the service of syntax, but the service can be poor. A request may result in the wrong item (deponency), or in an item the syntax already has (syncretism), or in an abundance of choices (inflectional classes or morphological allomorphy). Network Morphology regulates the service by recreating the morphosyntactic space as a network of information sharing nodes, where sharing is through inheritance, and inheritance can be overridden to allow for the regular, irregular, and, crucially, the semiregular. The network expresses the system; the way the network can be accessed expresses possible deviations from the systematic. And so Network Morphology captures the semi-systematic nature of morphology. The key data used to illustrate Network Morphology are noun inflections in the West Slavonic language Lower Sorbian, which has three genders, a rich case system and three numbers. These data allow us to observe how Network Morphology handles inflectional allomorphy, syncretism, feature neutralization, and irregularity. Latin deponent verbs are used to illustrate a Network Morphology account of morphological mismatch, where morphosyntactic features used in the syntax are expressed by morphology regularly used for different features. The analysis points to a separation of syntax and morphology in the architecture of the grammar. An account is given of Russian nominal derivation which assumes such a separation, and is based on viewing derivational morphology as lexical relatedness. Areas of the framework receiving special focus include default inheritance, global and local inheritance, default inference, and orthogonal multiple inheritance. The various accounts presented are expressed in the lexical knowledge representation language DATR, due to Roger Evans and Gerald Gazdar.

Article

The American descriptivist movement includes the work of Edward Sapir, Leonard Bloomfield, and their students, including Zellig Harris, Charles Hockett, and Kenneth Pike. Their work on morphology set the stage for much of the discussion of the subject in the years that followed, right up to today. In a number of ways they laid greater emphasis on the role of morphemes in morphological analysis when linguists in Europe focused more on the central role played by words in morphosyntactic paradigms.

Article

Yu-Ying Chuang and R. Harald Baayen

Naive discriminative learning (NDL) and linear discriminative learning (LDL) are simple computational algorithms for lexical learning and lexical processing. Both NDL and LDL assume that learning is discriminative, driven by prediction error, and that it is this error that calibrates the association strength between input and output representations. Both words’ forms and their meanings are represented by numeric vectors, and mappings between forms and meanings are set up. For comprehension, form vectors predict meaning vectors. For production, meaning vectors map onto form vectors. These mappings can be learned incrementally, approximating how children learn the words of their language. Alternatively, optimal mappings representing the end state of learning can be estimated. The NDL and LDL algorithms are incorporated in a computational theory of the mental lexicon, the ‘discriminative lexicon’. The model shows good performance both with respect to production and comprehension accuracy, and for predicting aspects of lexical processing, including morphological processing, across a wide range of experiments. Since, mathematically, NDL and LDL implement multivariate multiple regression, the ‘discriminative lexicon’ provides a cognitively motivated statistical modeling approach to lexical processing.

Article

Over the past decades, psycholinguistic aspects of word processing have made a considerable impact on views of language theory and language architecture. In the quest for the principles governing the ways human speakers perceive, store, access, and produce words, inflection issues have provided a challenging realm of scientific inquiry, and a battlefield for radically opposing views. It is somewhat ironic that some of the most influential cognitive models of inflection have long been based on evidence from an inflectionally impoverished language like English, where the notions of inflectional regularity, (de)composability, predictability, phonological complexity, and default productivity appear to be mutually implied. An analysis of more “complex” inflection systems such as those of Romance languages shows that this mutual implication is not a universal property of inflection, but a contingency of poorly contrastive, nearly isolating inflection systems. Far from presenting minor faults in a solid, theoretical edifice, Romance evidence appears to call into question the subdivision of labor between rules and exceptions, the on-line processing vs. long-term memory dichotomy, and the distinction between morphological processes and lexical representations. A dynamic, learning-based view of inflection is more compatible with this data, whereby morphological structure is an emergent property of the ways inflected forms are processed and stored, grounded in universal principles of lexical self-organization and their neuro-functional correlates.

Article

The morpheme was the central notion in morphological theorizing in the 20th century. It has a very intuitive appeal as the indivisible and invariant unit of form and meaning, a minimal linguistic sign. Ideally, that would be all there is to build words and sentences from. But this ideal does not appear to be entirely adequate. At least at a perhaps superficial understanding of form as a series of phonemes, and of meaning as concepts and morphosyntactic feature sets, the form and the meaning side of words are often not structured isomorphically. Different analytical reactions are possible to deal with the empirical challenges resulting from the various kinds of non-isomorphism between form and meaning. One prominent option is to reject the morpheme and to recognize conceptually larger units such as the word or the lexeme and its paradigm as the operands of morphological theory. This contrasts with various theoretical options maintaining the morpheme, terminologically or at least conceptually at some level. One such option is to maintain the morpheme as a minimal unit of form, relaxing the tension imposed by the meaning requirement. Another option is to maintain it as a minimal morphosyntactic unit, relaxing the requirements on the form side. The latter (and to a lesser extent also the former) has been understood in various profoundly different ways: association of one morpheme with several form variants, association of a morpheme with non-self-sufficient phonological units, or association of a morpheme with a formal process distinct from affixation. Variants of all of these possibilities have been entertained and have established distinct schools of thought. The overall architecture of the grammar, in particular the way that the morphology integrates with the syntax and the phonology, has become a driving force in the debate. If there are morpheme-sized units, are they pre-syntactic or post-syntactic units? Is the association between meaning and phonological information pre-syntactic or post-syntactic? Do morpheme-sized pieces have a specific status in the syntax? Invoking some of the main issues involved, this article draws a profile of the debate, following the term morpheme on a by-and-large chronological path from the late 19th century to the 21st century.