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Acoustic Theories of Speech Perception  

Melissa Redford and Melissa Baese-Berk

Acoustic theories assume that speech perception begins with an acoustic signal transformed by auditory processing. In classical acoustic theory, this assumption entails perceptual primitives that are akin to those identified in the spectral analyses of speech. The research objective is to link these primitives with phonological units of traditional descriptive linguistics via sound categories and then to understand how these units/categories are bound together in time to recognize words. Achieving this objective is challenging because the signal is replete with variation, making the mapping of signal to sound category nontrivial. Research that grapples with the mapping problem has led to many basic findings about speech perception, including the importance of cue redundancy to category identification and of differential cue weighting to category formation. Research that grapples with the related problem of binding categories into words for speech processing motivates current neuropsychological work on speech perception. The central focus on the mapping problem in classical theory has also led to an alternative type of acoustic theory, namely, exemplar-based theory. According to this type of acoustic theory, variability is critical for processing talker-specific information during speech processing. The problems associated with mapping acoustic cues to sound categories is not addressed because exemplar-based theories assume that perceptual traces of whole words are perceptual primitives. Smaller units of speech sound representation, as well as the phonology as a whole, are emergent from the word-based representations. Yet, like classical acoustic theories, exemplar-based theories assume that production is mediated by a phonology that has no inherent motor information. The presumed disconnect between acoustic and motor information during perceptual processing distinguishes acoustic theories as a class from other theories of speech perception.


The Acquisition of Color Words  

Katie Wagner and David Barner

Human experience of color results from a complex interplay of perceptual and linguistic systems. At the lowest level of perception, the human visual system transforms the visible light portion of the electromagnetic spectrum into a rich, continuous three-dimensional experience of color. Despite our ability to perceptually discriminate millions of different color shades, most languages categorize color into a number of discrete color categories. While the meanings of color words are constrained by perception, perception does not fully define them. Once color words are acquired, they may in turn influence our memory and processing speed for color, although it is unlikely that language influences the lowest levels of color perception. One approach to examining the relationship between perception and language in forming our experience of color is to study children as they acquire color language. Children produce color words in speech for many months before acquiring adult meanings for color words. Research in this area has focused on whether children’s difficulties stem from (a) an inability to identify color properties as a likely candidate for word meanings, or alternatively (b) inductive learning of language-specific color word boundaries. Lending plausibility to the first account, there is evidence that children more readily attend to object traits like shape, rather than color, as likely candidates for word meanings. However, recent evidence has found that children have meanings for some color words before they begin to produce them in speech, indicating that in fact, they may be able to successfully identify color as a candidate for word meaning early in the color word learning process. There is also evidence that prelinguistic infants, like adults, perceive color categorically. While these perceptual categories likely constrain the meanings that children consider, they cannot fully define color word meanings because languages vary in both the number and location of color word boundaries. Recent evidence suggests that the delay in color word acquisition primarily stems from an inductive process of refining these boundaries.


Acquisition of Pragmatics  

Myrto Grigoroglou and Anna Papafragou

To become competent communicators, children need to learn that what a speaker means often goes beyond the literal meaning of what the speaker says. The acquisition of pragmatics as a field is the study of how children learn to bridge the gap between the semantic meaning of words and structures and the intended meaning of an utterance. Of interest is whether young children are capable of reasoning about others’ intentions and how this ability develops over time. For a long period, estimates of children’s pragmatic sophistication were mostly pessimistic: early work on a number of phenomena showed that very young communicators were egocentric, oblivious to other interlocutors’ intentions, and overall insensitive to subtle pragmatic aspects of interpretation. Recent years have seen major shifts in the study of children’s pragmatic development. Novel methods and more fine-grained theoretical approaches have led to a reconsideration of older findings on how children acquire pragmatics across a number of phenomena and have produced a wealth of new evidence and theories. Three areas that have generated a considerable body of developmental work on pragmatics include reference (the relation between words or phrases and entities in the world), implicature (a type of inferred meaning that arises when a speaker violates conversational rules), and metaphor (a case of figurative language). Findings from these three domains suggest that children actively use pragmatic reasoning to delimit potential referents for newly encountered words, can take into account the perspective of a communicative partner, and are sensitive to some aspects of implicated and metaphorical meaning. Nevertheless, children’s success with pragmatic communication is fragile and task-dependent.


Arthur Abramson  

Philip Rubin

Arthur Seymour Abramson (1925–2017) was an American linguist who was prominent in the international experimental phonetics research community. He was best known for his pioneering work, with Leigh Lisker, on voice onset time (VOT), and for his many years spent studying tone and voice quality in languages such as Thai. Born and raised in Jersey City, New Jersey, Abramson served several years in the Army during World War II. Upon his return to civilian life, he attended Columbia University (BA, 1950; PhD, 1960). There he met Franklin Cooper, an adjunct who taught acoustic phonetics while also working for Haskins Laboratories. Abramson started working on a part-time basis at Haskins and remained affiliated with the institution until his death. For his doctoral dissertation (1962), he studied the vowels and tones of the Thai language, which would sit at the heart of his research and travels for the rest of his life. He would expand his investigations to include various languages and dialects, such as Pattani Malay and the Kuai dialect of Suai, a Mon-Khmer language. Abramson began his collaboration with University Pennsylvania linguist Leigh Lisker at Haskins Laboratories in the 1960s. Using their unique VOT technique, a sensitive measure of the articulatory timing between an occlusion in the vocal tract and the beginning of phonation (characterized by the onset of vibration of the vocal folds), they studied the voicing distinctions of various languages. Their long standing collaboration continued until Lisker’s death in 2006. Abramson and colleagues often made innovative use of state-of-art tools and technologies in their work, including transillumination of the larynx in running speech, X-ray movies of speakers in several languages/dialects, electroglottography, and articulatory speech synthesis. Abramson’s career was also notable for the academic and scientific service roles that he assumed, including membership on the council of the International Phonetic Association (IPA), and as a coordinator of the effort to revise the International Phonetic Alphabet at the IPA’s 1989 Kiel Convention. He was also editor of the journal Language and Speech, and took on leadership roles at the Linguistic Society of America and the Acoustical Society of America. He was the founding Chair of the Linguistics Department at the University of Connecticut, which became a hotbed for research in experimental phonetics in the 1970s and 1980s because of its many affiliations with Haskins Laboratories. He also served for many years as a board member at Haskins, and Secretary of both the Board and the Haskins Corporation, where he was a friend and mentor to many.


Articulatory Phonology  

Marianne Pouplier

One of the most fundamental problems in research on spoken language is to understand how the categorical, systemic knowledge that speakers have in the form of a phonological grammar maps onto the continuous, high-dimensional physical speech act that transmits the linguistic message. The invariant units of phonological analysis have no invariant analogue in the signal—any given phoneme can manifest itself in many possible variants, depending on context, speech rate, utterance position and the like, and the acoustic cues for a given phoneme are spread out over time across multiple linguistic units. Speakers and listeners are highly knowledgeable about the lawfully structured variation in the signal and they skillfully exploit articulatory and acoustic trading relations when speaking and perceiving. For the scientific description of spoken language understanding this association between abstract, discrete categories and continuous speech dynamics remains a formidable challenge. Articulatory Phonology and the associated Task Dynamic model present one particular proposal on how to step up to this challenge using the mathematics of dynamical systems with the central insight being that spoken language is fundamentally based on the production and perception of linguistically defined patterns of motion. In Articulatory Phonology, primitive units of phonological representation are called gestures. Gestures are defined based on linear second order differential equations, giving them inherent spatial and temporal specifications. Gestures control the vocal tract at a macroscopic level, harnessing the many degrees of freedom in the vocal tract into low-dimensional control units. Phonology, in this model, thus directly governs the spatial and temporal orchestration of vocal tract actions.


Audiovisual Speech Perception and the McGurk Effect  

Lawrence D. Rosenblum

Research on visual and audiovisual speech information has profoundly influenced the fields of psycholinguistics, perception psychology, and cognitive neuroscience. Visual speech findings have provided some of most the important human demonstrations of our new conception of the perceptual brain as being supremely multimodal. This “multisensory revolution” has seen a tremendous growth in research on how the senses integrate, cross-facilitate, and share their experience with one another. The ubiquity and apparent automaticity of multisensory speech has led many theorists to propose that the speech brain is agnostic with regard to sense modality: it might not know or care from which modality speech information comes. Instead, the speech function may act to extract supramodal informational patterns that are common in form across energy streams. Alternatively, other theorists have argued that any common information existent across the modalities is minimal and rudimentary, so that multisensory perception largely depends on the observer’s associative experience between the streams. From this perspective, the auditory stream is typically considered primary for the speech brain, with visual speech simply appended to its processing. If the utility of multisensory speech is a consequence of a supramodal informational coherence, then cross-sensory “integration” may be primarily a consequence of the informational input itself. If true, then one would expect to see evidence for integration occurring early in the perceptual process, as well in a largely complete and automatic/impenetrable manner. Alternatively, if multisensory speech perception is based on associative experience between the modal streams, then no constraints on how completely or automatically the senses integrate are dictated. There is behavioral and neurophysiological research supporting both perspectives. Much of this research is based on testing the well-known McGurk effect, in which audiovisual speech information is thought to integrate to the extent that visual information can affect what listeners report hearing. However, there is now good reason to believe that the McGurk effect is not a valid test of multisensory integration. For example, there are clear cases in which responses indicate that the effect fails, while other measures suggest that integration is actually occurring. By mistakenly conflating the McGurk effect with speech integration itself, interpretations of the completeness and automaticity of multisensory may be incorrect. Future research should use more sensitive behavioral and neurophysiological measures of cross-modal influence to examine these issues.


Cognitive Semantics in the Romance Languages  

Ulrich Detges

Cognitive semantics (CS) is an approach to the study of linguistic meaning. It is based on the assumption that the human linguistic capacity is part of our cognitive abilities, and that language in general and meaning in particular can therefore be better understood by taking into account the cognitive mechanisms that control the conceptual and perceptual processing of extra-linguistic reality. Issues central to CS are (a) the notion of prototype and its role in the description of language, (b) the nature of linguistic meaning, and (c) the functioning of different types of semantic relations. The question concerning the nature of meaning is an issue that is particularly controversial between CS on the one hand and structuralist and generative approaches on the other hand: is linguistic meaning conceptual, that is, part of our encyclopedic knowledge (as is claimed by CS), or is it autonomous, that is, based on abstract and language-specific features? According to CS, the most important types of semantic relations are metaphor, metonymy, and different kinds of taxonomic relations, which, in turn, can be further broken down into more basic associative relations such as similarity, contiguity, and contrast. These play a central role not only in polysemy and word formation, that is, in the lexicon, but also in the grammar.


Defectiveness in Morphology  

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.


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?


Direct Perception of Speech  

Carol A. Fowler

The theory of speech perception as direct derives from a general direct-realist account of perception. A realist stance on perception is that perceiving enables occupants of an ecological niche to know its component layouts, objects, animals, and events. “Direct” perception means that perceivers are in unmediated contact with their niche (mediated neither by internally generated representations of the environment nor by inferences made on the basis of fragmentary input to the perceptual systems). Direct perception is possible because energy arrays that have been causally structured by niche components and that are available to perceivers specify (i.e., stand in 1:1 relation to) components of the niche. Typically, perception is multi-modal; that is, perception of the environment depends on specifying information present in, or even spanning, multiple energy arrays. Applied to speech perception, the theory begins with the observation that speech perception involves the same perceptual systems that, in a direct-realist theory, enable direct perception of the environment. Most notably, the auditory system supports speech perception, but also the visual system, and sometimes other perceptual systems. Perception of language forms (consonants, vowels, word forms) can be direct if the forms lawfully cause specifying patterning in the energy arrays available to perceivers. In Articulatory Phonology, the primitive language forms (constituting consonants and vowels) are linguistically significant gestures of the vocal tract, which cause patterning in air and on the face. Descriptions are provided of informational patterning in acoustic and other energy arrays. Evidence is next reviewed that speech perceivers make use of acoustic and cross modal information about the phonetic gestures constituting consonants and vowels to perceive the gestures. Significant problems arise for the viability of a theory of direct perception of speech. One is the “inverse problem,” the difficulty of recovering vocal tract shapes or actions from acoustic input. Two other problems arise because speakers coarticulate when they speak. That is, they temporally overlap production of serially nearby consonants and vowels so that there are no discrete segments in the acoustic signal corresponding to the discrete consonants and vowels that talkers intend to convey (the “segmentation problem”), and there is massive context-sensitivity in acoustic (and optical and other modalities) patterning (the “invariance problem”). The present article suggests solutions to these problems. The article also reviews signatures of a direct mode of speech perception, including that perceivers use cross-modal speech information when it is available and exhibit various indications of perception-production linkages, such as rapid imitation and a disposition to converge in dialect with interlocutors. An underdeveloped domain within the theory concerns the very important role of longer- and shorter-term learning in speech perception. Infants develop language-specific modes of attention to acoustic speech signals (and optical information for speech), and adult listeners attune to novel dialects or foreign accents. Moreover, listeners make use of lexical knowledge and statistical properties of the language in speech perception. Some progress has been made in incorporating infant learning into a theory of direct perception of speech, but much less progress has been made in the other areas.


Experimental Pragmatics  

Florian Schwarz

While both pragmatic theory and experimental investigations of language using psycholinguistic methods have been well-established subfields in the language sciences for a long time, the field of Experimental Pragmatics, where such methods are applied to pragmatic phenomena, has only fully taken shape since the early 2000s. By now, however, it has become a major and lively area of ongoing research, with dedicated conferences, workshops, and collaborative grant projects, bringing together researchers with linguistic, psychological, and computational approaches across disciplines. Its scope includes virtually all meaning-related phenomena in natural language comprehension and production, with a particular focus on what inferences utterances give rise to that go beyond what is literally expressed by the linguistic material. One general area that has been explored in great depth consists of investigations of various ‘ingredients’ of meaning. A major aim has been to develop experimental methodologies to help classify various aspects of meaning, such as implicatures and presuppositions as compared to basic truth-conditional meaning, and to capture their properties more thoroughly using more extensive empirical data. The study of scalar implicatures (e.g., the inference that some but not all students left based on the sentence Some students left) has served as a catalyst of sorts in this area, and they constitute one of the most well-studied phenomena in Experimental Pragmatics to date. But much recent work has expanded the general approach to other aspects of meaning, including presuppositions and conventional implicatures, but also other aspects of nonliteral meaning, such as irony, metonymy, and metaphors. The study of reference constitutes another core area of research in Experimental Pragmatics, and has a more extensive history of precursors in psycholinguistics proper. Reference resolution commonly requires drawing inferences beyond what is conventionally conveyed by the linguistic material at issue as well; the key concern is how comprehenders grasp the referential intentions of a speaker based on the referential expressions used in a given context, as well as how the speaker chooses an appropriate expression in the first place. Pronouns, demonstratives, and definite descriptions are crucial expressions of interest, with special attention to their relation to both intra- and extralinguistic context. Furthermore, one key line of research is concerned with speakers’ and listeners’ capacity to keep track of both their own private perspective and the shared perspective of the interlocutors in actual interaction. Given the rapid ongoing growth in the field, there is a large number of additional topical areas that cannot all be mentioned here, but the final section of the article briefly mentions further current and future areas of research.


Experimental Semiotics  

Bruno Galantucci

Experimental Semiotics (ES) is a burgeoning new discipline aimed at investigating in the laboratory the development of novel forms of human communication. Conceptually connected to experimental research on language use, ES provides a scientific complement to field studies of spontaneously emerging new languages and studies on the emergence of communication systems among artificial agents. ES researchers have created quite a few research paradigms to investigate the development of novel forms of human communication. Despite their diversity, these paradigms all rely on the use of semiotic games, that is, games in which people can succeed reliably only after they have developed novel communication systems. Some of these games involve creating novel signs for pre-specified meanings. These games are particularly suitable for studying relatively large communication systems and their structural properties. Other semiotic games involve establishing shared meanings as well as novel signs to communicate about them. These games are typically rather challenging and are particularly suitable for investigating the processes through which novel forms of communication are created. Considering that ES is a methodological stance rather than a well-defined research theme, researchers have used it to address a greatly heterogeneous set of research questions. Despite this, and despite the recent origins of ES, two of these questions have begun to coalesce into relatively coherent research themes. The first theme originates from the observation that novel communication systems developed in the laboratory tend to acquire features that are similar to key features of natural language. Most notably, they tend (a) to rely on the use of symbols—that is purely conventional signs—and (b) to adopt a combinatorial design, using a few basic units to express a large number of meanings. ES researchers have begun investigating some of the factors that lead to the acquisition of such features. These investigations suggest two conclusions. The first is that the emergence of symbols depends on the fact that, when repeatedly using non-symbolic signs, people tend to progressively abstract them. The second conclusion is that novel communication systems tend to adopt a combinatorial design more readily when their signs have low degrees of motivation and fade rapidly. The second research theme originates from the observation that novel communication systems developed in the laboratory tend to begin systematically with motivated—that is non-symbolic—signs. ES investigations of this tendency suggest that it occurs because motivation helps people bootstrap novel forms of communication. Put it another way, these investigations show that it is very difficult for people to bootstrap communication through arbitrary signs.


Game Theory in Pragmatics: Evolution, Rationality, and Reasoning  

Michael Franke

Game theory provides formal means of representing and explaining action choices in social decision situations where the choices of one participant depend on the choices of another. Game theoretic pragmatics approaches language production and interpretation as a game in this sense. Patterns in language use are explained as optimal, rational, or at least nearly optimal or rational solutions to a communication problem. Three intimately related perspectives on game theoretic pragmatics are sketched here: (i) the evolutionary perspective explains language use as the outcome of some optimization process, (ii) the rationalistic perspective pictures language use as a form of rational decision-making, and (iii) the probabilistic reasoning perspective considers specifically speakers’ and listeners’ beliefs about each other. There are clear commonalities behind these three perspectives, and they may in practice blend into each other. At the heart of game theoretic pragmatics lies the idea that speaker and listener behavior, when it comes to using a language with a given semantic meaning, are attuned to each other. By focusing on the evolutionary or rationalistic perspective, we can then give a functional account of general patterns in our pragmatic language use. The probabilistic reasoning perspective invites modeling actual speaker and listener behavior, for example, as it shows in quantitative aspects of experimental data.


Humor in Language  

Salvatore Attardo

Interest in the linguistics of humor is widespread and dates since classical times. Several theoretical models have been proposed to describe and explain the function of humor in language. The most widely adopted one, the semantic-script theory of humor, was presented by Victor Raskin, in 1985. Its expansion, to incorporate a broader gamut of information, is known as the General Theory of Verbal Humor. Other approaches are emerging, especially in cognitive and corpus linguistics. Within applied linguistics, the predominant approach is analysis of conversation and discourse, with a focus on the disparate functions of humor in conversation. Speakers may use humor pro-socially, to build in-group solidarity, or anti-socially, to exclude and denigrate the targets of the humor. Most of the research has focused on how humor is co-constructed and used among friends, and how speakers support it. Increasingly, corpus-supported research is beginning to reshape the field, introducing quantitative concerns, as well as multimodal data and analyses. Overall, the linguistics of humor is a dynamic and rapidly changing field.


Ideophones (Mimetics, Expressives)  

Kimi Akita and Mark Dingemanse

Ideophones, also termed mimetics or expressives, are marked words that depict sensory imagery. They are found in many of the world’s languages, and sizable lexical classes of ideophones are particularly well-documented in the languages of Asia, Africa, and the Americas. Ideophones are not limited to onomatopoeia like meow and smack but cover a wide range of sensory domains, such as manner of motion (e.g., plisti plasta ‘splish-splash’ in Basque), texture (e.g., tsaklii ‘rough’ in Ewe), and psychological states (e.g., wakuwaku ‘excited’ in Japanese). Across languages, ideophones stand out as marked words due to special phonotactics, expressive morphology including certain types of reduplication, and relative syntactic independence, in addition to production features like prosodic foregrounding and common co-occurrence with iconic gestures. Three intertwined issues have been repeatedly debated in the century-long literature on ideophones. (a) Definition: Isolated descriptive traditions and cross-linguistic variation have sometimes obscured a typologically unified view of ideophones, but recent advances show the promise of a prototype definition of ideophones as conventionalized depictions in speech, with room for language-specific nuances. (b) Integration: The variable integration of ideophones across linguistic levels reveals an interaction between expressiveness and grammatical integration, and has important implications for how to conceive of dependencies between linguistic systems. (c) Iconicity: Ideophones form a natural laboratory for the study of iconic form-meaning associations in natural languages, and converging evidence from corpus and experimental studies suggests important developmental, evolutionary, and communicative advantages of ideophones.


Innateness of Language  

Yarden Kedar

A fundamental question in epistemological philosophy is whether reason may be based on a priori knowledge—that is, knowledge that precedes and which is independent of experience. In modern science, the concept of innateness has been associated with particular behaviors and types of knowledge, which supposedly have been present in the organism since birth (in fact, since fertilization)—prior to any sensory experience with the environment. This line of investigation has been traditionally linked to two general types of qualities: the first consists of instinctive and inflexible reflexes, traits, and behaviors, which are apparent in survival, mating, and rearing activities. The other relates to language and cognition, with certain concepts, ideas, propositions, and particular ways of mental computation suggested to be part of one’s biological make-up. While both these types of innatism have a long history (e.g., debate by Plato and Descartes), some bias appears to exist in favor of claims for inherent behavioral traits, which are typically accepted when satisfactory empirical evidence is provided. One famous example is Lorenz’s demonstration of imprinting, a natural phenomenon that obeys a predetermined mechanism and schedule (incubator-hatched goslings imprinted on Lorenz’s boots, the first moving object they encountered). Likewise, there seems to be little controversy in regard to predetermined ways of organizing sensory information, as is the case with the detection and classification of shapes and colors by the mind. In contrast, the idea that certain types of abstract knowledge may be part of an organism’s biological endowment (i.e., not learned) is typically met with a greater sense of skepticism. The most influential and controversial claim for such innate knowledge in modern science is Chomsky’s nativist theory of Universal Grammar in language, which aims to define the extent to which human languages can vary; and the famous Argument from the Poverty of the Stimulus. The main Chomskyan hypothesis is that all human beings share a preprogrammed linguistic infrastructure consisting of a finite set of general principles, which can generate (through combination or transformation) an infinite number of (only) grammatical sentences. Thus, the innate grammatical system constrains and structures the acquisition and use of all natural languages.


Learning and Using Morphology and Morphosyntax in a Second Language  

Laurie Beth Feldman and Judith F. Kroll

We summarize findings from across a range of methods, including behavioral measures of overall processing speed and accuracy, electrophysiological indices that tap into the early time course of language processing, and neural measures using structural and functional imaging. We argue that traditional claims about rigid constraints on the ability of late bilinguals to exploit the meaning and form of the morphology and morphosyntax in a second language should be revised so as to move away from all or none command of structures motivated from strict dichotomies among linguistic categories of morphology. We describe how the dynamics of morphological processing in neither monolingual or bilingual speakers is easily characterized in terms of the potential to decompose words into their constituent morphemes and that morphosyntactic processing is not easily characterized in terms of categories of structures that are learnable and those that are unlearnable by bilingual and nonnative speakers. Instead, we emphasize the high degree of variability across individuals and plasticity within individuals in their ability to successfully learn and use even subtle aspects of a second language. Further, both of the bilingual’s two languages become active when even one language is engaged, and parallel activation has consequences that shape both languages, thus their influence is not in the unidirectional manner that was traditionally assumed. We briefly discuss the nature of possible constraints and directions for future research.


Lexical Representations in Language Processing  

Gary Libben

Words are the backbone of language activity. An average 20-year-old native speaker of English will have a vocabulary of about 42,000 words. These words are connected with one another within the larger network of lexical knowledge that is termed the mental lexicon. The metaphor of a mental lexicon has played a central role in the development of theories of language and mind and has provided an intellectual meeting ground for psychologists, neurolinguists, and psycholinguists. Research on the mental lexicon has shown that lexical knowledge is not static. New words are acquired throughout the life span, creating very large increases in the richness of connectivity within the lexical system and changing the system as a whole. Because most people in the world speak more than one language, the default mental lexicon may be a multilingual one. Such a mental lexicon differs substantially from a lexicon of an individual language and would lead to the creation of new integrated lexical systems due to the pressure on the system to organize and access lexical knowledge in a homogenous manner. The mental lexicon contains both word knowledge and morphological knowledge. There is also evidence that it contains multiword strings such as idioms and lexical bundles. This speaks in support of a nonrestrictive “big tent” view of units of representation within the mental lexicon. Changes in research on lexical representations in language processing have emphasized lexical action and the role of learning. Although the metaphor of words as distinct representations within a lexical store has served to advance knowledge, it is more likely that words are best seen as networks of activity that are formed and affected by experience and learning throughout the life span.


Mirativity in Morphology  

Tyler Peterson

Broadly defined, mirativity is the linguistic term often used to describe utterances that speakers use to express their surprise at some unexpected state, event, or activity they experience. As an illustration, imagine the following scenario: rain is an infrequent occurrence in the Arizona desert, and the news forecast predicts another typically long stretch of sunny weather. Wanda and her colleague are planning a hike in the mountains that afternoon. Aware of this prediction, and being familiar with the typical desert climate, they step outside into the pouring rain. This elicits the surprise of Wanda: based on the weather forecast and coupled with her background knowledge, the rain is an unexpected event. As such, Wanda has a number of linguistic options for expressing her surprise to her colleague; for example, Wow, it’s raining!It’s raining!No way, it’s raining?(!)I can’t believe it’s raining(!)I see it’s raining(!)It looks like it’s raining(!)Look at all this rain(!) These utterances provide a sample of the diverse lexical and grammatical strategies a speaker of English can deploy in order to express surprise at an unexpected event, including expressive particles such as wow and no way, surprised intonational contours (orthographically represented by the exclamation mark ‘!’), rhetorical questions, expressions of disbelief, and evidential verbs such as look and see. When we look across the world’s languages we find that there is considerable intra- and cross-linguistic diversity in how mirative meanings are linguistically expressed. The examples above show how English lacks specific morphology dedicated to mirativity; however, the focus of this article is on the role morphology plays in the expression of mirative meanings.


Models of Human Sentence Comprehension in Computational Psycholinguistics  

John Hale

Computational models of human sentence comprehension help researchers reason about how grammar might actually be used in the understanding process. Taking a cognitivist approach, this article relates computational psycholinguistics to neighboring fields (such as linguistics), surveys important precedents, and catalogs open problems.