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The motivation for the project was the necessity of finding solutions to situations characterized by difficulty in communication, such as trading between different countries, immigrants unable to speak the language, or between hearing and deaf people who use sign language. These and other cases can be solved thanks to interpreting services. Yet because of educational commitments of professionals, organizational time, budget, and locations, it is not always possible to avail of an on-site interpreter. In this context, technology offers a solution through remote interpretation. The present draws inspiration from the research project “VEASYT Live! for conference: linguistic and technological solutions for the supply of video remote interpreting services in conference settings”. The work was financed by the European Social Fund and took place between 2016 and 2017 in the Linguistic and Cultural Compared Studies Department of Ca’ Foscari University of Venice in partnership with VEASYT srl, a company that developed a video remote interpreting (VRI) service in both vocal languages and Italian Sign Language. The aim of the research is to develop VRI for conference situations such as seminars, conferences and academic lectures.

The present paper will explore the impacts of the recent pandemic crisis on the Italian Deaf community, as a linguistic minority. Recent research has shown that minorities are suffering much more the effects of the pandemia because their lack of access to services and in a much wider perspective, to education and welfare. We will show that, during the COVID crisis, despite lockdown measures, various actions at the formal political level (from the Italian Deaf Association) and at the informal level (from the members of the community) promoted sign language and the Deaf community within the hearing majority. In particular, we will analyse how social networks were exploited at the grassroot level in order to promote social cohesion and share information about the coronavirus emergency and how the Deaf community shaped the interpreting services on the public media. The role of social networks, however, has gone far beyond the emergency as it has allowed deaf people to create a new virtual space where it was possible to discuss the appropriateness of various linguistic choices related to the COVID lexicon and to argue about the various interpreting services. Furthermore, in such emergency, the interpreting services were shaped following the needs expressed by the Deaf community with the results of an increased visibility of Italian sign language (LIS) and empowerment of the community. Materials spontaneously produced by members of the Deaf Italian community (conferences, debates, fairy tales, and entertainment games) were selected, as well as materials produced by LIS interpreters committed to guaranteeing access to information. By highlighting the strategies that a minority group put in place to deal with the COVID-19 emergency, we can better understand the peculiarities of that community, creating a bridge between worlds that often travel in parallel for respecting the peculiarities of each other (deaf and hearing communities).

International audience; This paper presents a study of French Sign Language (LSF) temporal constructions. While we know from spoken language research that temporal constructions can be expressed through a variety of syntactic strategies such as subordination, juxtaposition, and coordination, finding their equivalent in sign languages is often a challenge due to the absence of overt complementizers and other function words such as coordinators. This study explores temporal constructions in LSF and frames them within a broad typological perspective. We show that LSF temporal clauses are very different from those of Italian Sign language (LIS) studied by Aristodemo (2017). Specifically, LSF temporal constructions are composed of two coordinated clauses and the temporal marker is integrated into the second conjunct. LIS temporal clauses, on the other hand, are composed of a main and a subordinated clause. This finding shows that the typological categories found in spoken language are also relevant for sign language studies.

Relativization is a robust subordinating type across languages, displaying important typological variability concerning the position of the nominal head that the relative clause modifies, and sign languages are no exception. It has been widely assumed since Keenan & Comrie (1977) that the subject position is more accessible to relativization than object and oblique positions. The main aim of this paper is to investigate the extension of this famous generalization both across modalities (sign as opposed to spoken languages) and across relativization typologies (internally as opposed to externally headed relatives), and to verify how it interacts with age of first language exposure. We here report the results of a sentence-to-picture matching task assessing the comprehension of subject and object relative clauses (RCs) in three sign languages: French Sign Language (LSF), Catalan Sign Language (LSC), and Italian Sign Language (LIS). The results are that object RCs are never easier to comprehend than subject RCs. Remarkably, this is independent from the type of relative clause (internally or externally headed). As for the impact of age of exposure, we found that native signers outperform non-native signers and that a delay in language exposure emphasizes the subject/object asymmetry. Our results introduce a new potential diagnostic for LF movement: the existence of a Subject Advantage in comprehension can be used as a reliable and measurable cue for the existence of long-distance dependencies, including covert ones. The research summarized in this paper is part of the SIGN-HUB project, which has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No 693349.

Contains fulltext : 246492.pdf (Publisher’s version ) (Open Access) Meanings communicated with depictions constitute an integral part of how speakers and signers actually use language (Clark, 2016). Recent studies have argued that, in sign languages, depicting strategy like constructed action (CA), in which a signer enacts the referent, is used for referential purposes in narratives. Here, we tested the referential function of CA in a more controlled experimental setting and outside narrative context. Given the iconic properties of CA we hypothesized that this strategy could be used for efficient information transmission. Thus, we asked if use of CA increased with the increase in the information required to be communicated. Twenty-three deaf signers of LIS described unconnected images, which varied in the amount of information represented, to another player in a director–matcher game. Results revealed that participants used CA to communicate core information about the images and also increased the use of CA as images became informatively denser. The findings show that iconic features of CA can be used for referential function in addition to its depictive function outside narrative context and to achieve communicative efficiency. 30 p.

We propose a sign language recognition system based on wearable electronics and two different classification algorithms. The wearable electronics were made of a sensory glove and inertial measurement units to gather fingers, wrist, and arm/forearm movements. The classifiers were k-Nearest Neighbors with Dynamic Time Warping (that is a non-parametric method) and Convolutional Neural Networks (that is a parametric method). Ten sign-words were considered from the Italian Sign Language: cose, grazie, maestra, together with words with international meaning such as google, internet, jogging, pizza, television, twitter, and ciao. The signs were repeated one-hundred times each by seven people, five male and two females, aged 29&ndash, 54 y &plusmn, 10.34 (SD). The adopted classifiers performed with an accuracy of 96.6% &plusmn, 3.4 (SD) for the k-Nearest Neighbors plus the Dynamic Time Warping and of 98.0% &plusmn, 2.0 (SD) for the Convolutional Neural Networks. Our system was made of wearable electronics among the most complete ones, and the classifiers top performed in comparison with other relevant works reported in the literature.

Contains fulltext : 220150.pdf (Publisher’s version ) (Closed access) A fundamental assumption about language is that, regardless of language modality, it faces the linearization problem, i.e., an event that occurs simultaneously in the world has to be split in language to be organized on a temporal scale. However, the visual modality of signed languages allows its users not only to express meaning in a linear manner but also to use iconicity and multiple articulators together to encode information simultaneously. Accordingly, in cases when it is necessary to encode informatively rich events, signers can take advantage of simultaneous encoding in order to represent information about different referents and their actions simultaneously. This in turn would lead to more iconic and direct representation. Up to now, there has been no experimental study focusing on simultaneous encoding of information in signed languages and its possible advantage for efficient communication. In the present study, we assessed how many information units can be encoded simultaneously in Italian Sign Language (LIS) and whether the amount of simultaneously encoded information varies based on the amount of information that is required to be expressed. Twenty-three deaf adults participated in a director-matcher game in which they described 30 images of events that varied in amount of information they contained. Results revealed that as the information that had to be encoded increased, signers also increased use of multiple articulators to encode different information (i.e., kinematic simultaneity) and density of simultaneously encoded information in their production. Present findings show how the fundamental properties of signed languages, i.e., iconicity and simultaneity, are used for the purpose of efficient information encoding in Italian Sign Language (LIS). 20 p.

The present study investigates the types of verb and symbolic representational strategies used by 10 deaf signing adults and 13 deaf signing children who described in Italian Sign Language 45 video clips representing nine action types generally communicated by five general verbs in spoken Italian. General verbs, in which the same sign was produced to refer to several different physical action types, were rarely used by either group of participants. Both signing children and adults usually produced specific depicting predicates by incorporating, through a representational strategy, the object and/or the modality of the action into the sign. As for the different types of representational strategies, the adults used the hand-as-object strategy more frequently than the children, who, in turn, preferred to use the hand-as-hand strategy, suggesting that different degrees of cognitive complexity are involved in these two symbolic strategies. Addressing the symbolic iconic strategies underlying sign formation could provide new insight into the perceptual and cognitive processes of linguistic meaning construction. The findings reported here support two main assumptions of cognitive linguistics applied to sign languages: there is a strong continuity between gestures and language; lexical units and depicting constructions derive from the same iconic core mechanism of sign creation.

Sign language recognition systems are used to convert signs in video streams to text automatically. In this work, an original isolated sign language recognition model is created using Convolutional Neural Networks (CNNs), Feature Pooling Module and Long Short-Term Memory Networks (LSTMs). In the CNN part, a pre-trained VGG-16 model is used identically in two parallel architectures, after adapting its weights to the dataset; in this architecture, the features from color (RGB) and depth streams are extracted in parallel. The extracted features are directed to FPM to generate multi-scale features. The features matrices are reduced to representative feature vectors, using Global Average Pooling (GAP). The features that are obtained from RGB and depth streams are concatenated and passed to the LSTM architecture after instance normalization. We get 93.15% test accuracy on Montalbano Italian sign language dataset using the proposed model; this result is comparable with the recent state-of-the-art methods.

The aim of this study was to investigate, using an eye-tracking tool, the processes behind the exploration of written texts performed by deaf people with different language skills and different educational backgrounds. Our sample comprised 36 deaf participants (12 of whom use Italian sign language most of the time, 12 who use Italian only, and 12 who can use both languages) and 12 hearing participants who could not understand any sign language. This research shows how in respect of oculomotor movements the discriminant variable is linked to the different educational backgrounds and the reading habits of participants.

Many properties of languages, including sign languages, are not uniformly distributed among items in the lexicon. Some of this nonuniformity can be accounted for by appeal to articulatory ease, with easier articulations being overrepresented in the lexicon in comparison to more difficult articulations. The literature on ease of articulation deals only with the active effort internal to the articulation itself. We note the existence of a previously unstudied aspect of articulatory ease, which we call reactive effort: the effort of resisting incidental movement that has been induced by an articulation elsewhere in the body. For example, reactive effort is needed to resist incidental twisting and rocking of the torso induced by path movement of the manual articulators in sign languages. We argue that, as part of a general linguistic drive to reduce articulatory effort, reactive effort should have a significant effect on the relative frequency in the lexicon of certain types of path movements. We support this argument with evidence from Italian Sign Language, Sri Lankan Sign Language, and Al-Sayyid Bedouin Sign Language, evidence that cannot be explained solely by appeal to constraints on bimanual coordination. As the first exploration of the linguistic role of reactive effort, this work contributes not only to the developing field of sign language phonetics, but also to our understanding of phonetics in general, adding to a growing body of functionalist literature showing that some linguistic patterns emerge from more fundamental factors of the physical world.

Signs and Structures: Formal Approaches to Sign Language Syntax, ed. Pawel Rutkowski (Amsterdam: John Benjamins, 2015). ISBN 978-9-027-24259-4; EUR 80.00; Hardbound; 143 pages.SIGNS AND STRUCTURES: FORMAL APPROACHES TO SIGN LANGUAGE SYNTAX is a collection of papers published as a special issue of Sign Language & Linguistics 16(2) (2013); the papers were initially presented at the Warsaw conference on Formal and Experimental Advances in Sign Language Theory in 2012. Since this conference was not devoted to one particular topic, the book is also not thematically homogeneous. Nevertheless, the motivation for publishing this collection is clear and commendable: Its contributions reflect some of the most important directions in the current research on the syntax of sign languages within formal linguistics. The topics discussed in the book have been widely explored recently, and these papers add valuable data, analyses, and theoretical implications to the debate.The first contribution, by Natasha Abner, is devoted to the ASL possessive marker poss, which can be used attributively (e.g., bruno poss book "Bruno's book") and predicatively (book poss bruno "The book belongs to Bruno"). Contrary to previous analyses, Abner argues that the attributive poss is derived from the predicative poss. She provides several convincing arguments (from morphology, syntax, and semantics) in favor of her analysis. For instance, she notes that the predicative poss but not the attributive poss has a transitive agreement pattern and that some of the word orders possible for the predicative poss are not possible in the attributive construction. Semantically, the predicative poss is more restr icted: It can express only ownership (strict possession), but not other interpretations, such as authorship, so book poss bruno can mean only that he owns it, not that he wrote it. Focusing on the predicative poss, Abner shows that it is a verb: It appears in the same positions as lexical verbs, shows object and optional subject agreement, and can be aspectually marked. She then offers an explicit syntactic account in which predicative poss is combined with the possessor and the possessee to build a VP, and then the VP is embedded as a complement of a locative predicate (Loc), which forms a complex predicate together with poss. This (in combination with object shift) accounts for possible word orders in the predicative structure and also explains why only strict possession can be expressed by the predicative poss: The locative head is responsible for this semantic restriction. Attributive poss is not restricted this way because it is derived through relative clause formation that targets the structure below Loc. Other properties of attributive poss are also accounted for by the explicit analysis of the relative clause formation. The article is well argued and clearly written, which should also make it accessible to nonformal linguists.The second contribution, by Chiara Branchini and colleagues, addresses the phenomenon of wh-doubling (wh-duplication in the authors' terms) in Italian Sign Language (LIS). The phenomenon of doubling has recently received a good deal of attention, and a for mal analysis in term of Nunes's (2004) copy theory of movement has been suggested for other sign languages. However, previous research (including some conducted by the same authors) has claimed that LIS does not have wh-doubling. In this contribution the authors report that, in corpus data, 13 percent of all cases of wh-questions involve wh-doubling. The authors then use the corpus data to analyze general properties of this phenomenon and to demonstrate that the copies are phonologically and prosodically identical if one takes into account the effect of phrase-final lengthening. By drawing on additionally elicited data, the authors argue that the copies of the wh-word occur in Spec,CP (which is to the right in LIS) and in Spec,FocP (which is to the left). They account for the identical phonological realization of the copies and other syntactic properties of the construction by claiming that the copies actually belong to different chains sharing one foot (the in situ instance of the wh-word). …

Surface Electromyography (EMG) and Inertial Measurement Unit (IMU) sensors are gaining the attention of the research community as data sources for automatic sign language recognition. In this regard, we provide a dataset of EMG and IMU data collected using the Myo Gesture Control Armband, during the execution of the 26 gestures of the Italian Sign Language alphabet. For each gesture, 30 data acquisitions were executed, composing a total of 780 samples included in the dataset. The gestures were performed by the same subject (male, 24 years old) in lab settings. EMG and IMU data were collected in a 2 seconds time window, at a sampling frequency of 200 Hz.

The aim of this study is to analyze Italian Sign Language (LIS) linguistic skills in two groups of deaf signing children at different ages, and to compare their skills with those of a group of deaf signing adults. For this purpose, we developed a new Sentence Reproduction Task (SRT) for Italian Sign Language (LIS-SRT), which we administered to 33 participants. Participants' scores and type of errors were analyzed to investigate similarities and differences related to both chronological age and age of LIS acquisition. Results showed that signs tended to be omitted more frequently by the younger children than both the older children and adults and that non-manual components produced simultaneously with manual components appear to be the most difficult linguistic elements to be acquired and mastered. Our results are compared to those of previous studies using SRTs for other signed languages.

Languages have diverse strategies for marking agentivity and number. These strategies are negotiated to create combinatorial systems. We consider the emergence of these strategies by studying features of movement in a young sign language in Nicaragua (NSL). We compare two age cohorts of Nicaraguan signers (NSL1 and NSL2), adult homesigners in Nicaragua (deaf individuals creating a gestural system without linguistic input), signers of American and Italian Sign Languages (ASL and LIS), and hearing individuals asked to gesture silently. We find that all groups use movement axis and repetition to encode agentivity and number, suggesting that these properties are grounded in action experiences common to all participants. We find another feature – unpunctuated repetition – in the sign systems (ASL, LIS, NSL, Homesign) but not in silent gesture. Homesigners and NSL1 signers use the unpunctuated form, but limit its use to No-Agent contexts; NSL2 signers use the form across No-Agent and Agent contexts. A single individual can thus construct a marker for number without benefit of a linguistic community (homesign), but generalizing this form across agentive conditions requires an additional step. This step does not appear to be achieved when a linguistic community is first formed (NSL1), but requires transmission across generations of learners (NSL2).

The level of integration of mouthing into the sign language system was investigated using a novel experimental procedure. We constructed a word/sign matching task in which the signer has to indicate whether a LIS (Italian Sign Language) sign matches the written Italian word that follows the video presentation of the sign. In the congruent condition, the word matches the sign, while in the incongruent condition the word matches a sign which forms a minimal pair with the sign that has been presented in the video. To form minimal pairs, all four traditional formational parameters for signs plus mouthing were considered. Lip movements were present only in mouthing minimal pairs. In the incongruent condition we compared mouthing minimal pairs separately to handshape minimal pairs, location minimal pairs, movement minimal pairs, and palm orientation minimal pairs. Accuracy was markedly lower for minimal pairs distinguished by mouthing than for minimal pairs distinguished by one of the four parameters. In the congruent condition we compared mouthing minimal pairs to all the other minimal pairs, in which lips movements were absent. Reaction times were shorter in the presence of mouthing as a consequence of the strong mapping between orthography and mouthing, confirming that mouthing is highly connected to the Italian lexicon. Participants seem to consider mouthing external to the sign to be matched with the word. We propose that cases of disambiguation by mouthing should be interpreted as cases of simultaneous code mixing. Therefore, our experimental results suggest that mouthing is not a core component of sign languages.

Recent evidence demonstrates that pictures corresponding to iconic signs are named faster than pictures corresponding to non-iconic signs. The present study investigates the locus of the iconicity advantage in hearing bimodal bilinguals. A naming experiment with iconic and non-iconic pictures in Italian Sign Language (LIS) was conducted. Bimodal bilinguals named the pictures either using a noun construction that involved the production of the sign corresponding to the picture or using a marked demonstrative pronoun construction replacing the picture sign. In this last condition, the pictures were colored and participants were instructed to name the pronoun together with the color. The iconicity advantage was reliable in the noun utterance but not in the marked demonstrative pronoun utterance. In a third condition, the colored pictures were presented as distractor stimuli and participants required to name the color. In this last condition, distractor pictures with iconic signs elicited faster naming latencies than non-iconic signs. The results suggest that the advantage of iconic signs in production arises at the level of semantic-to-phonological links. In addition, we conclude that bimodal bilinguals and native signers do not differ in terms of the activation flow within the sign production system.

In this paper the cognitive, cultural, and linguistic bases for a pattern of conventionalization of two types of iconic handshapes are described. Work on sign languages has shown that handling handshapes (H-HSs: those that represent how objects are handled or manipulated) and object handshapes (O-HSs: those that represent the class, size, or shape of objects) express an agentive/non-agentive semantic distinction in many sign languages. H-HSs are used in agentive event descriptions and O-HSs are used in non-agentive event descriptions. In this work, American Sign Language (ASL) and Italian Sign Language (LIS) productions are compared (adults and children) as well as the corresponding groups of gesturers in each country using "silent gesture." While the gesture groups, in general, did not employ an H-HS/O-HS distinction, all participants (signers and gesturers) used iconic handshapes (H-HSs and O-HSs together) more often in agentive than in no-agent event descriptions; moreover, none of the subjects produced an opposite pattern than the expected one (i.e., H-HSs associated with no-agent descriptions and O-HSs associated with agentive ones). These effects are argued to be grounded in cognition. In addition, some individual gesturers were observed to produce the H-HS/O-HS opposition for agentive and non-agentive event descriptions--that is, more Italian than American adult gesturers. This effect is argued to be grounded in culture. Finally, the agentive/non-agentive handshape opposition is confirmed for signers of ASL and LIS, but previously unreported cross-linguistic differences were also found across both adult and child sign groups. It is, therefore, concluded that cognitive, cultural, and linguistic factors contribute to the conventionalization of this distinction of handshape type.

What supports deaf signers advantage over nonsigners on visuospatial short-term memory (STM) tasks is still a matter of debate. We compared the performance of 18 deaf Italian Sign Language (LIS) users with that of a matched group of Italian hearing nonsigners in three different tasks: two versions of the Corsi Block test, namely span forward and span backward, and the Visual Pattern Test (VPT). Although the Corsi forward and backward are dynamic and mainly involve a spatial component, the VPT is static and taps primarily the visual component of STM. Signers significantly outperformed nonsigners on both versions of the Corsi Block test, whereas they performed significantly worse on the VPT. We suggest that the source of the different pattern lies in the static nature of the VPT versus the dynamic nature of the Corsi spans. © The Author 2014. Published by Oxford University Press. All rights reserved.

To address the negative effects of deafness on spoken language acquisition, many clinicians suggest using cochlear implant (CI) and oral education and advise against sign language, even when combined with spoken language (i.e., bilingualism), believing that it may slow down spoken language development. In a deaf child with CI who was exposed at an early age to Italian Sign Language and spoken Italian, we evaluated language development and the relationship between the two languages. The number of words/signs produced by the child consistently increased with age, and the vocabulary growth rate in spoken Italian was equivalent to that of hearing peers. Before CI, the child relied almost exclusively on sign language; after CI, he gradually shifted to spoken Italian yet still used sign language when unable to retrieve words in spoken Italian. We conclude that bimodal bilingualism may scaffold the development of spoken language also in deaf children with CI.

We argue that some sign language loci (i.e. positions in signing space that realize discourse referents) are both formal variables and simplified representations of what they denote; in other words, they are simultaneously logical symbols and pictorial representations. We develop a 'formal semantics with iconicity' that accounts for their dual life; the key idea ('formal iconicity') is that some geometric properties of signs must be preserved by the interpretation function. We analyze in these terms three kinds of iconic effects in American and French Sign Language (ASL and LSF): (i) structural iconicity, where relations of inclusion and complementation among loci are directly reflected in their denotations; (ii) locus-external iconicity, where the high or low position of a locus in signing space has a direct semantic reflex, akin to the semantic contribution of gender features of pronouns; and (iii) locus-internal iconicity, where different parts of a structured locus are targeted by different directional verbs, as was argued by Liddell and Kegl. The resulting semantics combines insights of two traditions that have been sharply divided by recent debates. In line with the 'formalist camp' (e.g. Lillo-Martin and Klima, Neidle, and Sandler and Lillo-Martin), our theory treats loci as variables, and develops an explicit formal analysis of their behavior. But we also incorporate insights of the 'iconic camp', which emphasized the role of iconic constraints in sign language in general and in pronominals in particular (e.g. Cuxac, Taub, Liddell). However, this synthesis is only possible if formal semantics makes provisions for iconic requirements at the very core of its interpretive procedure. (An Appendix discusses relevant data from Italian Sign Language [LIS].)

The present study examined whether full access to sign language as a medium for instruction could influence performance in Theory of Mind (ToM) tasks. Three groups of Italian participants (age range: 6-14 years) participated in the study: Two groups of deaf signing children and one group of hearing-speaking children. The two groups of deaf children differed only in their school environment: One group attended a school with a teaching assistant (TA; Sign Language is offered only by the TA to a single deaf child), and the other group attended a bilingual program (Italian Sign Language and Italian). Linguistic abilities and understanding of false belief were assessed using similar materials and procedures in spoken Italian with hearing children and in Italian Sign Language with deaf children. Deaf children attending the bilingual school performed significantly better than deaf children attending school with the TA in tasks assessing lexical comprehension and ToM, whereas the performance of hearing children was in between that of the two deaf groups. As for lexical production, deaf children attending the bilingual school performed significantly better than the two other groups. No significant differences were found between early and late signers or between children with deaf and hearing parents.

It is widely known that supranational institutions and organizations, like the United Nations and the European Commission, encouraged national governments to recognize national sign languages as the languages of their Deaf communities. Nonetheless, Italy has not yet recognized Italian Sign Language (LIS) as the official language of the Deaf community in Italy. At present, a number of proposals are still awaiting discussion by the Italian Parliament, which has postponed consideration of them for many years. Despite the general unconcern for LIS at the highest levels of national political institutions, local governments provide help and financial support for local integration projects, especially those involving deaf children. Within this institutional picture, LIS is quite viable and visible throughout the country. For instance, national TV news broadcasts are interpreted several times every day (by both public and private broadcasting corporations), and messages in LIS are commonly used to inform Deaf people of major events (such as national and regional elections and national referenda). Furthermore, signers may have an interpreter when asked to be present in court for trials. Moreover, the main Deaf organization, namely, Ente Nazionale Sordi, which is widespread in Italy, actively collaborates with both local and national institutions, especially to promote the use of LIS by deaf and hearing children in bilingual school programs. Ente Nazionale Sordi (ENS) also provides language courses for hearing adults who are interested in LIS and for interpreters who want specialized instruction. In this article, we describe the current situation of the Italian Deaf community and the status of its sign language. Starting with the latest national law on language minorities (482/1999), we explain some of the reasons that LIS has not yet been recognized as the official language of the Italian Deaf community. We then focus on some of the most relevant initiatives entertained by local governments, ENS, and universities in order to strengthen LIS and make it more visible to the hearing community. Since a lack of standardization might partly explain why LIS has not yet been recognized, we disentangle this issue by illustrating some interesting results of a recent sociolinguistic investigation. The picture that we draw shows that LIS is ready to be officially designated as the language of the Italian Deaf community.

This article summarizes early approaches to sociolinguistic research and the factors that condition variation in sign languages. The article then examines the methodological issues that arise in the study of sign languages before discussing recent research on variation in several different sign languages and dialects including Black ASL, Australian Sign Language, New Zealand Sign Language, and Italian Sign Language. This research shows that sign languages, like spoken languages, are subject to a wide range of internal and external constraints, some of which are particular to sign languages. We conclude with suggestions for future research.