Bimodal Bilinguals Research Articles

Language co-activation and lexical selection in bimodal bilinguals: Evidence from picture-word interference.

We used picture-word interference (PWI) to discover a) whether cross-language activation at the lexical level can yield phonological priming effects when languages do not share phonological representations, and b) whether semantic interference effects occur without articulatory competition. Bimodal bilinguals fluent in American Sign Language (ASL) and English named pictures in ASL while listening to distractor words that were 1) translation equivalents, 2) phonologically related to the target sign through translation, 3) semantically related, or 4) unrelated. Monolingual speakers named pictures in English. Production of ASL signs was facilitated by words that were phonologically related through translation and by translation equivalents, indicating that cross-language activation spreads from lexical to phonological levels for production. Semantic interference effects were not observed for bimodal bilinguals, providing some support for a post-lexical locus of semantic interference, but which we suggest may instead reflect time course differences in spoken and signed production in the PWI task.

Bilingualism alters brain functional connectivity between “control” regions and “language” regions: Evidence from bimodal bilinguals

Previous neuroimaging studies have revealed that bilingualism induces both structural and functional neuroplasticity in the dorsal anterior cingulate cortex (dACC) and the left caudate nucleus (LCN), both of which are associated with cognitive control. Since these “control” regions should work together with other language regions during language processing, we hypothesized that bilingualism may also alter the functional interaction between the dACC/LCN and language regions. Here we tested this hypothesis by exploring the functional connectivity (FC) in bimodal bilinguals and monolinguals using functional MRI when they either performed a picture naming task with spoken language or were in resting state. We found that for bimodal bilinguals who use spoken and sign languages, the FC of the dACC with regions involved in spoken language (e.g. the left superior temporal gyrus) was stronger in performing the task, but weaker in the resting state as compared to monolinguals. For the LCN, its intrinsic FC with sign language regions including the left inferior temporo-occipital part and right inferior and superior parietal lobules was increased in the bilinguals. These results demonstrate that bilingual experience may alter the brain functional interaction between “control” regions and “language” regions. For different control regions, the FC alters in different ways. The findings also deepen our understanding of the functional roles of the dACC and LCN in language processing.

On the temporal dynamics of sign production: An ERP study in Catalan Sign Language (LSC)

This study investigates the temporal dynamics of sign production and how particular aspects of the signed modality influence the early stages of lexical access. To that end, we explored the electrophysiological correlates associated to sign frequency and iconicity in a picture signing task in a group of bimodal bilinguals. Moreover, a subset of the same participants was tested in the same task but naming the pictures instead. Our results revealed that both frequency and iconicity influenced lexical access in sign production. At the ERP level, iconicity effects originated very early in the course of signing (while absent in the spoken modality), suggesting a stronger activation of the semantic properties for iconic signs. Moreover, frequency effects were modulated by iconicity, suggesting that lexical access in signed language is determined by the iconic properties of the signs. These results support the idea that lexical access is sensitive to the same phenomena in word and sign production, but its time-course is modulated by particular aspects of the modality in which a lexical item will be finally articulated.

Sobreposição no desenvolvimento bilíngue bimodal

Crianças bilíngues desenvolvem sensibilidade para escolher as línguas de seus interlocutores de forma muito precoce, o que se reflete nas proporções diferenciadas do uso de cada língua. Os fatores tais como o contexto do discurso e a relativa dominância das línguas na comunidade podem também determinar o grau de diferenciação dos usos das línguas nas crianças em fase préescolar. Crianças bilíngues bimodais, ou seja, as que estão adquirindo uma língua de sinais e uma língua falada, simultaneamente, estão diante de um contexto mais complexo de negociações. Além da alternância de línguas, essas crianças produzem a sobreposição de línguas, que é um fenômeno sociolinguístico análogo àquele, mas sem a supressão de uma das línguas. Este estudo analisa produções espontâneas de crianças bilíngues bimodais, interagindo com seus interlocutores surdos ou ouvintes (duas crianças americanas e duas brasileiras). Nossos resultados mostram que, mesmo nas produções mais iniciais, as crianças produzem mais enunciados sinalizados com seus interlocutores surdos e mais enunciados falados com os seus interlocutores ouvintes. Todas as quatro crianças produziram enunciados bimodais, tanto nas sessões em que a língua alvo era a fala ou os sinais, mas de forma muito mais frequente nas sessões em sinais, potencialmente porque as crianças acham mais difícil suprimir a língua dominante. Esses resultados indicam que essas crianças bilíngues bimodais são sensíveis às línguas e seus interlocutores, enquanto apresentam uma influência considerável da língua dominante da sua comunidade.

Language choice in bimodal bilingual development.

Bilingual children develop sensitivity to the language used by their interlocutors at an early age, reflected in differential use of each language by the child depending on their interlocutor. Factors such as discourse context and relative language dominance in the community may mediate the degree of language differentiation in preschool age children. Bimodal bilingual children, acquiring both a sign language and a spoken language, have an even more complex situation. Their Deaf parents vary considerably in access to the spoken language. Furthermore, in addition to code-mixing and code-switching, they use code-blending—expressions in both speech and sign simultaneously—an option uniquely available to bimodal bilinguals. Code-blending is analogous to code-switching sociolinguistically, but is also a way to communicate without suppressing one language. For adult bimodal bilinguals, complete suppression of the non-selected language is cognitively demanding. We expect that bimodal bilingual children also find suppression difficult, and use blending rather than suppression in some contexts. We also expect relative community language dominance to be a factor in children's language choices. This study analyzes longitudinal spontaneous production data from four bimodal bilingual children and their Deaf and hearing interlocutors. Even at the earliest observations, the children produced more signed utterances with Deaf interlocutors and more speech with hearing interlocutors. However, while three of the four children produced >75% speech alone in speech target sessions, they produced <25% sign alone in sign target sessions. All four produced bimodal utterances in both, but more frequently in the sign sessions, potentially because they find suppression of the dominant language more difficult. Our results indicate that these children are sensitive to the language used by their interlocutors, while showing considerable influence from the dominant community language.

What Medical Education can do to Ensure Robust Language Development in Deaf Children

The typical medical education curriculum does not address language development for deaf and hard-of-hearing (DHH) children. However, this issue is medical because of the frequency with which DHH children as a population face health complications due to linguistic deprivation. The critical period for language development is early; if a child does not acquire an intact language before age five, the child is unlikely to ever have native-like use of any language. Such linguistic deprivation carries risks of cognitive delay and psycho-social health difficulties. Spoken language is inaccessible for many DHH children despite assistive-technology developments. But sign languages, because they are visual, are accessible to most DHH children. To ensure language development, DHH children should have exposure to a sign language in their early years, starting at birth. If they also receive successful training in processing and producing a spoken language, they will have the many benefits of bimodal bilingualism. Undergraduate medical education curricula should include information about early language acquisition so that physicians can advise families of deaf newborns and newly deafened young children how to protect their cognitive health. Graduate medical education in primary care, pediatrics, and otolaryngology should include extensive information about amplification/cochlear implants, language modality, and the latest research/practices to promote the development and education of DHH children. Training in how to establish connections with local authorities and services that can support parents and child should be included as well. Further, students need to learn how to work with sign language interpreters in caring for DHH patients. We offer suggestions as to how medical curricula can be appropriately enriched and point to existing programs and initiatives that can serve as resources.

Deaf parents of cochlear-implanted children: beliefs on bimodal bilingualism.

This study investigated 17 Deaf (1) families in North America with cochlear-implanted children about their attitudes, beliefs, and practices on bimodal bilingualism (defined as using both a visual/manual language and an aural/oral language) in American Sign Language (ASL) and English. A survey and follow-up interviews with 8 families were conducted. The majority of the Deaf families exhibited positive beliefs toward bimodal bilingualism, where they set high expectations for their children to become equally fluent in both languages. However, their perspectives about the purpose for each language differed; they viewed English as a "survival language" and ASL as a "cultural language" but supported the use of both languages at home as part of their children's lives.

Words in the bilingual brain: an fNIRS brain imaging investigation of lexical processing in sign-speech bimodal bilinguals.

Early bilingual exposure, especially exposure to two languages in different modalities such as speech and sign, can profoundly affect an individual's language, culture, and cognition. Here we explore the hypothesis that bimodal dual language exposure can also affect the brain's organization for language. These changes occur across brain regions universally important for language and parietal regions especially critical for sign language (Newman et al., 2002). We investigated three groups of participants (N = 29) that completed a word repetition task in American Sign Language (ASL) during fNIRS brain imaging. Those groups were (1) hearing ASL-English bimodal bilinguals (n = 5), (2) deaf ASL signers (n = 7), and (3) English monolinguals naïve to sign language (n = 17). The key finding of the present study is that bimodal bilinguals showed reduced activation in left parietal regions relative to deaf ASL signers when asked to use only ASL. In contrast, this group of bimodal signers showed greater activation in left temporo-parietal regions relative to English monolinguals when asked to switch between their two languages (Kovelman et al., 2009). Converging evidence now suggest that bimodal bilingual experience changes the brain bases of language, including the left temporo-parietal regions known to be critical for sign language processing (Emmorey et al., 2007). The results provide insight into the resilience and constraints of neural plasticity for language and bilingualism.

Switching between Estonian Sign Language and spoken Estonian in a school environment

The study focuses on the variables and functions that affect switching (code-switching and code-blending) between Estonian Sign Language and spoken Estonian among bimodal bilinguals in a school environment. It was found that deaf students at Tallinn Helen’s School predominantly code-blended (simultaneously spoke and signed), whereas their peers from Tartu Hiie School tended to code-switch (stopped speaking and started signing or vice versa). A deaf student’s level of switching was influenced most by the interlocutor’s level of switching, which highlights the importance of input provided by teachers. Although the most often used function of switching was to emphasise a constituent in a clause, the students also switched to express themselves in an original way (humour, language play) and to attract attention, while the teachers sometimes used switching for pedagogical reasons or to side-comment. In cases where it appeared problematic to apply a single function to a switch, a sequential turn-by-turn analysis (Auer 1995) was used. DOI: http://dx.doi.org/10.5128/ERYa10.06

Language development in a bimodal bilingual child with cochlear implant: A longitudinal study

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.

Exploring Linguistic Interdependence between American Sign Language and English through Correlational and Multiple Regression Analyses of the Abilities of Biliterate Deaf Adults

The purpose of this study was to explore issues of linguistic interdependence between American Sign Language (ASL) and English within the context of reading comprehension skills among thirty-two bilingual Deaf (Note 1) adults. By synthesizing findings within existing literature, a prediction model of reading comprehension was developed. Researchers investigated whether or not the threshold hypothesis and linguistic interdependence theory (Cummins, 1976, 1979, 1981, 2003) could be generalizable to bimodal bilinguals. Researchers investigated relationships among six instructional constructs and several environmental variables thought to be predictor variables for reading comprehension. Statistically significant findings included the identification of ten relationships among instructional predictors and five relationships regarding environmental factors. Statistically significant relationships are presented and implications for the generalizability of linguistic interdependence for bimodal bilinguals are summarized. Results of this study suggest that both the threshold hypothesis and linguistic interdependence theory are both generalizable to ASL and English, despite linguistic incongruency. Specific proficiencies transferred among ASL Morphology and English Reading Vocabulary, ASL Morphology and English Reading Comprehension, and ASL Semantics and English Language Mechanics.

Novel evidence in support of the bilingual advantage: Influences of task demands and experience on cognitive control and working memory

The bilingual advantage-enhanced cognitive control relative to monolinguals-possibly occurs due to experience engaging general cognitive mechanisms in order to manage two languages. Supporting this hypothesis is evidence that bimodal (signed language-spoken language) bilinguals do not demonstrate such an advantage, presumably because the distinct language modalities reduce conflict and control demands. We hypothesized that the mechanism responsible for the bilingual advantage is the interplay between (a) the magnitude of bilingual management demands and (b) the amount of experience managing those demands. We recruited adult bimodal bilinguals with high bilingual management demands and examined cognitive control and working memory capacity longitudinally. After gaining experience managing high bilingual management demands, participants outperformed themselves from 2 years earlier on cognitive abilities associated with managing the bilingual demands. These results suggest that cognitive control outcomes for bilinguals vary as a function of the mechanisms recruited during bilingual management and the amount of experience managing the bilingual demands.

Parallel Bimodal Bilingual Acquisition: A Hearing Child Mediated in a Deaf Family

The aim of this longitudinal case study was to describe bimodal and bilingual acquisition in a hearing child, Hugo, especially the role his Deaf family played in his linguistic education. Video observations of the family interactions were conducted from the time Hugo was 10 months of age until he was 40 months old. The family language was Swedish Sign Language (SSL). With Hugo, however, the parents used one language base in which single gestural signs or vocal words were often simultaneously inserted (the latter when not in visual contact). Hugo showed an awareness of visual attention to SSL communication at 22 months and differentiated vocal and gestural modality according to his interlocutor two months later. During the 28-month and 32-month sessions, a grammatical analysis might explain why Hugo’s use of SSL was rare. The findings are possibly vital for a broader international audience than professionals who meet bimodal-bilingual children.

Quantitative and qualitative aspects of switching between Estonian Sign Language and spoken Estonian

The central research question of the present paper is ‘What variables influence switching (code-switching and code-blending) between Estonian Sign Language and spoken Estonian among bimodal bilinguals in a school environment?’ The data from guided discussions involving deaf and hearing students indicated that bimodal bilinguals predominantly code-blend, i.e. simultaneously produce speech and signs. The main function of switching among the students was to emphasise a constituent in a clause, but they also switched to express themselves in an original way. In some utterances, it proved difficult to apply a single function to a switch, thus a sequential turn-by-turn analysis was employed. A deaf student’s level of switching was influenced most by the hearing status of the interlocutor, and the amount of switching by the interlocutor. DOI: http://dx.doi.org/10.5128/ERYa9.03

An analysis of code-switching in bimodal bilinguals: Brazilian Sign Language and Portuguese)

An analysis of code-switching in bimodal bilinguals: Brazilian Sign Language and Portuguese)

Acquiring bimodal bilingualism differently: a hearing and a deaf twin mediated in a deaf family

Acquiring bimodal bilingualism differently: a hearing and a deaf twin mediated in a deaf family

Bimodal Bilingualism and the Frequency-Lag Hypothesis

The frequency-lag hypothesis proposes that bilinguals have slowed lexical retrieval relative to monolinguals and in their nondominant language relative to their dominant language, particularly for low-frequency words. These effects arise because bilinguals divide their language use between 2 languages and use their nondominant language less frequently. We conducted a picture-naming study with hearing American Sign Language (ASL)-English bilinguals (bimodal bilinguals), deaf signers, and English-speaking monolinguals. As predicted by the frequency-lag hypothesis, bimodal bilinguals were slower, less accurate, and exhibited a larger frequency effect when naming pictures in ASL as compared with English (their dominant language) and as compared with deaf signers. For English there was no difference in naming latencies, error rates, or frequency effects for bimodal bilinguals as compared with monolinguals. Neither age of ASL acquisition nor interpreting experience affected the results; picture-naming accuracy and frequency effects were equivalent for deaf signers and English monolinguals. Larger frequency effects in ASL relative to English for bimodal bilinguals suggests that they are affected by a frequency lag in ASL. The absence of a lag for English could reflect the use of mouthing and/or code-blending, which may shield bimodal bilinguals from the lexical slowing observed for spoken language bilinguals in the dominant language.

"We Communicated That Way for a Reason": Language Practices and Language Ideologies Among Hearing Adults Whose Parents Are Deaf

Families with deaf parents and hearing children are often bilingual and bimodal, with both a spoken language and a signed one in regular use among family members. When interviewed, 13 American hearing adults with deaf parents reported widely varying language practices, sign language abilities, and social affiliations with Deaf and Hearing communities. Despite this variation, the interviewees' moral judgments of their own and others' communicative behavior suggest that these adults share a language ideology concerning the obligation of all family members to expend effort to overcome potential communication barriers. To our knowledge, such a language ideology is not similarly pervasive among spoken-language bilingual families, raising the question of whether there is something unique about family bimodal bilingualism that imposes different rights and responsibilities on family members than spoken-language family bilingualism does. This ideology unites an otherwise diverse group of interviewees, where each one preemptively denied being a "typical CODA [children of deaf adult]."

Bilinguality and bimodality: Comparing linguistic and visual acculturation in artists’ letters and their works

In this paper the letters of bilingual artists are proposed as a new source of evidence for understanding the relationship of bilinguality with individual identity. This approach is first situated within a more qualitative tradition in sociolinguistics, which allows the speaker’s individuality to be understood in more depth. Thanks to having two modes of expression, linguistic and artistic, bimodal bilinguals provide new insights into the impact of being immersed in a new culture and language. A sample of the correspondence of two 19th century bicultural and bilingual artists, Lucien Pissarro and Vincent van Gogh, is analysed. Comparisons are made between their linguistic style, especially their code-switching, and their biculturality as manifested in the artistic field. Their works, like their use of language, show the intermingling of influences of their culture of origin and that of their adoption. It is suggested on the basis of this study that investigating bimodal bilingualism may provide a bridge to help us understand the connections between language, identities and the way different cultural experiences are brought together.

Bimodal bilinguals co-activate both languages during spoken comprehension

Bilinguals have been shown to activate their two languages in parallel, and this process can often be attributed to overlap in input between the two languages. The present study examines whether two languages that do not overlap in input structure, and that have distinct phonological systems, such as American Sign Language (ASL) and English, are also activated in parallel. Hearing ASL-English bimodal bilinguals’ and English monolinguals’ eye-movements were recorded during a visual world paradigm, in which participants were instructed, in English, to select objects from a display. In critical trials, the target item appeared with a competing item that overlapped with the target in ASL phonology. Bimodal bilinguals looked more at competing item than at phonologically unrelated items and looked more at competing items relative to monolinguals, indicating activation of the sign-language during spoken English comprehension. The findings suggest that language co-activation is not modality specific, and provide insight into the mechanisms that may underlie cross-modal language co-activation in bimodal bilinguals, including the role that top-down and lateral connections between levels of processing may play in language comprehension.