Deaf Adults Research Articles

Should I inherit Japanese Sign Language as a children of deaf adults?

Should I inherit Japanese Sign Language as a children of deaf adults?

Deaf mental health: enhancing literacy through a hearing and deaf community collaboration

This article explores the process through which findings of a doctoral study became the impetus for the development of a Deaf Mental Health Committee and two community-based events intended to enhance the mental health literacy of the Deaf community in a large metropolitan city in central Canada. The author, a hearing professional and University professor has provided professional counselling services to clients including those who are Deaf and hard of hearing, and conducted a number of studies in and with the Deaf community. Her doctoral study reported on the experience and narratives of a sample of Deaf adults diagnosed with Major Depressive Disorder. Participant narratives highlighted gaps in understanding of mental health and mental illness. A goal of enhancing mental health literacy in the Deaf community developed into the establishment of a Deaf Mental Health Committee. This article presents the successes of that Deaf and hearing collaboration.

O cloze como indicador do desenvolvimento linguístico e da representação emergente do português brasileiro

Estudos com análise da produção escrita de surdos crianças e adultos mostram evidências que compõem aqui um complexo quadro de ideias e hipóteses sobre a representação do PB emergente nessa população. Nossas investigações, fundamentadas em pressupostos sociocognitivistas da Linguística Cognitivo-Funcional (BYBEE, 2016; GOLDBERG, 2006; 2019; TOMASELLO, 2003), têm indicado que o componente morfossintático acumula grande parte das divergências materializadas em textos desses aprendizes. Embora divergências no uso de L2 sejam esperadas, chama atenção a pouca diferença na reorganização do conhecimento linguístico que se espera mutável ao longo de anos de escolarização e de contato com o PB escrito. As investigações centradas na produção têm recebido maior atenção dos estudos nas áreas da linguística e da educação de surdos. A habilidade de leitura, no entanto, não parece receber a mesma atenção. Questão que se levanta é se a atividade leitora também seria comprometida pelas divergentes combinações de itens lexicais e gramaticais, que parecem integrar o conhecimento linguístico desses aprendizes, a julgar por seus textos produzidos com muitas divergências morfossintáticas que comprometem os sentidos. O objetivo deste artigo é oferecer evidências sobre o desenvolvimento linguístico de aprendizes surdos universitários, que permitam caracterizar a representação cognitiva de construções nominais. Como resultado da análise de dois instrumentos em formato de Cloze adaptado, aplicados a 24 participantes, este artigo apresenta uma tipologia de esquemas nominais que parece integrar um sistema de competidores (SOARES, 2018). Esperamos que nossos resultados possam contribuir para uma didática aquisicional para surdos, com melhor aproveitamento do input escrito.

Word and Nonword Reading Efficiency in Postlingually Deafened Adult Cochlear Implant Users.

This study tested the hypotheses that 1) experienced adult cochlear implants (CI) users demonstrate poorer reading efficiency relative to normal-hearing controls, 2) reading efficiency reflects basic, underlying neurocognitive skills, and 3) reading efficiency relates to speech recognition outcomes in CI users. Weak phonological processing skills have been associated with poor speech recognition outcomes in postlingually deaf adult CI users. Phonological processing can be captured in nonauditory measures of reading efficiency, which may have wide use in patients with hearing loss. This study examined reading efficiency in adults CI users, and its relation to speech recognition outcomes. Forty-eight experienced, postlingually deaf adult CI users (ECIs) and 43 older age-matched peers with age-normal hearing (ONHs) completed the Test of Word Reading Efficiency (TOWRE-2), which measures word and nonword reading efficiency. Participants also completed a battery of nonauditory neurocognitive measures and auditory sentence recognition tasks. ECIs and ONHs did not differ in word (ECIs: M = 78.2, SD = 11.4; ONHs: M = 83.3, SD = 10.2) or nonword reading efficiency (ECIs: M = 42.0, SD = 11.2; ONHs: M = 43.7, SD = 10.3). For ECIs, both scores were related to untimed word reading with moderate to strong effect sizes (r = 0.43-0.69), but demonstrated differing relations with other nonauditory neurocognitive measures with weak to moderate effect sizes (word: r = 0.11-0.44; nonword: r = (-)0.15 to (-)0.42). Word reading efficiency was moderately related to sentence recognition outcomes in ECIs (r = 0.36-0.40). Findings suggest that postlingually deaf adult CI users demonstrate neither impaired word nor nonword reading efficiency, and these measures reflect different underlying mechanisms involved in language processing. The relation between sentence recognition and word reading efficiency, a measure of lexical access speed, suggests that this measure may be useful for explaining outcome variability in adult CI users.

Human emotional vocalizations can develop in the absence of auditory learning.

Are emotional expressions shaped by specialized innate mechanisms that guide learning, or do they develop exclusively from learning without innate preparedness? Here we test whether nonverbal affective vocalisations produced by bilaterally congenitally deaf adults contain emotional information that is recognisable to naive listeners. Because these deaf individuals have had no opportunity for auditory learning, the presence of such an association would imply that mappings between emotions and vocalizations are buffered against the absence of input that is typically important for their development and thus at least partly innate. We recorded nonverbal vocalizations expressing 9 emotions from 8 deaf individuals (435 tokens) and 8 matched hearing individuals (536 tokens). These vocalizations were submitted to an acoustic analysis and used in a recognition study in which naive listeners (n = 812) made forced-choice judgments. Our results show that naive listeners can reliably infer many emotional states from nonverbal vocalizations produced by deaf individuals. In particular, deaf vocalizations of fear, disgust, sadness, amusement, sensual pleasure, surprise, and relief were recognized at better-than-chance levels, whereas anger and achievement/triumph vocalizations were not. Differences were found on most acoustic features of the vocalizations produced by deaf as compared with hearing individuals. Our results suggest that there is an innate component to the associations between human emotions and vocalizations. (PsycInfo Database Record (c) 2020 APA, all rights reserved).

Effects and Non-Effects of Late Language Exposure on Spatial Language Development: Evidence from Deaf Adults and Children

ABSTRACT Late exposure to the first language, as in the case of deaf children with hearing parents, hinders the production of linguistic expressions, even in adulthood. Less is known about the development of language soon after language exposure and if late exposure hinders all domains of language in children and adults. We compared late signing adults and children (MAge = 8;5) 2 years after exposure to sign language, to their age-matched native signing peers in expressions of two types of locative relations that are acquired in certain cognitive-developmental order: view-independent (IN-ON-UNDER) and view-dependent (LEFT-RIGHT). Late signing children and adults differed from native signers in their use of linguistic devices for view-dependent relations but not for view-independent relations. These effects were also modulated by the morphological complexity. Hindering effects of late language exposure on the development of language in children and adults are not absolute but are modulated by cognitive and linguistic complexity.

Psychiatric Functioning, Resilience, and Recovery Among Deaf Consumers of Public Behavioral Health Services.

Studies of deaf individuals generally indicate higher levels of mental illness and negative mental health outcomes compared to the general population (Anglemyer and Crespi in JAMA 2018: 3285153, 2018; Dammeyer and Chapman in JAMA 52: 807-813, 2017; Fellinger et al. in JAMA 379: 17-23, 2012; Hall et al. in JAMA 52: 761-776, 2017; as reported by Leigh and Pollard (M. Marschark and P. Spencer (eds) Oxford handbook of deaf studies, language and education, Oxford University Press, UK 2003); Landsberger et al. in JAMA 45, 42-51, 2014; Pollard in JAMA 39, 147-160, 1994). The purpose of this study is to understand the demographic variables, psychiatric symptoms, functioning, resilience, and recovery in a sample of 11,703 deaf adults. The de-identified dataset was provided by Beacon Health Options and Maryland Behavioral Health Administration and includes information about deaf adult consumers of public behavioral health services. Findings revealed that compared to hearing consumers in the dataset, deaf consumers were less likely to live in independent housing. They were more likely to live in structured community housing, such as group homes, or be homelessness. They had higher rates of arrests and incarcerations, higher proportion of unemployment, and higher rates of cigarette smoking. Deaf participants had lower rates of substance use. Deaf women in this sample reported significantly more difficulty in managing their psychiatric symptoms than deaf men. Deaf people of color had lower levels of psychiatric dysfunction, lower resilience, and greater recovery compared to white participants, which was inconsistent with other studies of people of color. Younger participants had significantly more difficulty with psychiatric symptoms and functioning than those in the older groups. Those who were 31-55years old had higher resilience than those who were older than 56years old. The author offers several recommendations for further research of the mental health of deaf populations, especially round race, age, and gender.

Assessment of speech perception and quality of life after cochlear implant in postlingual deaf adults

Objective:The study is aimed to evaluate impacts of cochlear implantation on speech perception and quality of life in postlingual deaf adults, and to explore the correlation between speech perception and quality of life using Nijimegen Cochlear Implantation Questionnaire and Mandarin version of Minimum Speech Test Battery. Method:Thirty-six postlingual deafpatients were recruited, including 20 males and 16 females. Patient age was 20 to 72 years old（52±16） when CI was implanted, and the hearing loss duration was 2 to 25 years（14±6） before cochlear implantation. The single syllable recognition rate score were tested by using Mandarin version of Minimum Speech Test Battery, and the quantify quality of life was tested by using Nijimegen Cochlear Implantation Questionnaire. Result:Speech recognition and quality of life have significantly improved in patients with CI after cochlear implantiont. The scores of basic sound perception, advanced sound perception, speech ability, self-confidence, social activity ability, and social ability have improved, but the differences were not statistically significant. The Mandrin single-syllable recognition rate scores were related to basic sound perception（r=-0.36; P=0.004）, advanced sound perception（r=-0.41; P=0.002）, and speech ability（r=-0.67; P=0.001）, and the differences are statistically significant. Conclusion:The postlingual deafnesses ability of auditory, speech perception and the quality of life have improved significantly in patients with CI after cochlear implantiont.

The effect of sport training on otolith function in adults with profound sensorineural hearing loss

Objectives It seems that regular physical activity leading to favourable alternations in the bodily system, including improved muscle mass, as well as better postural control. This study aims to assess the effect of strenuous training program on balance function in deaf adults. Methods During a cross-sectional design, 50 deaf patients and 22 healthy adults (with no history of vertigo and hearing loss) were included. Deaf patients were also classified as “non-athletes” and “athletes” groups. The vestibular (Otolith) function testing was carried out using the cervical vestibular-evoked myogenic potential (cVEMP) and ocular vestibular-evoked myogenic potential (oVEMP). Results The mean p13 latency and p13-n23 amplitude of cVEMPs in the control group were significantly shorter, and larger than the deaf groups, respectively. Furthermore, the mean p13-latency in “athletes deaf” group was significantly earlier than the “non-athletes deaf” group. The p1 and n1 oVEMP peak latencies were significantly prolonged in deaf patients than the controls. The comparison of the asymmetry ratio between the control and deaf groups was significant only for the cVEMP response. Conclusion Our results indicated that otolithic dysfunction is a common and hidden problem in the deaf population. Strenuous sport training in adults can be considered as an effective therapeutic intervention to stimulate vestibular function in deaf patients.

Encountering Music: Songs Seen, Felt, and Heard

The aesthetics of accessibility, where considerations of access shape both the creation and presentation of a production, are a driving force in Canadian Deaf and disability theatre. In this article, we reflect on sound, music, access, and audism in Songs My Mother Never Sung Me, a bilingual American Sign Language (ASL) and sung English chamber opera written and composed by Dave Clarke and produced by Concrete Theatre at SOUND OFF: A Deaf Theatre Festival in 2019. This fictionalized memoir is based on Clarke’s experience as a CODA (Child of Deaf Adult) and explores the complex relationship of a hearing boy and his Deaf mom. In this piece, music and sound are not only aural elements, but are also tactile vibration, visual projection, and rhythmic ASL. This convergence of the senses expands conceptions of sound and music to comment on the inequality of Deaf and hearing access in the world beyond theatre production as audience position and ASL comprehension gave audiences differing access to the tactile vibration and ASL.

Commentary: Shapes and Sites of Deaf People’s Transinstitutionalization


 
 
 This commentary describes our perspective on transinstitutionalization as deaf teachers and researchers from different regions of Canada, and accounts for some of the ways in which transinstitutionalization manifests in the lives of deaf people, particularly in educational settings. In the present day, so-called inclusive education is often presented as the progressive alternative to institutionalization, or deaf schools. However, mainstream education in regular settings without adequate sign language support and the continuing polarization of language and identity options for deaf children are two of the main ways in which transinstitutionalization recurs for deaf children and adults and threatens the vitality of sign languages.
 
 

Development of cortical auditory responses to speech in noise in unilaterally deaf adults following cochlear implantation.

BackgroundFor patients with single-sided deafness (SSD), restoration of binaural function via cochlear implant (CI) has been shown to improve speech understanding in noise. The objective of this study was to investigate changes in behavioral performance and cortical auditory responses following cochlear implantation.DesignProspective longitudinal study.SettingTertiary referral center.MethodsSix adults with SSD were tested before and 12 months post-activation of the CI. Six normal hearing (NH) participants served as experimental controls. Speech understanding in noise was evaluated for various spatial conditions. Cortical auditory evoked potentials were recorded with /ba/ stimuli in quiet and in noise. Global field power and responses at Cz were analyzed.ResultsSpeech understanding in noise significantly improved with the CI when speech was presented to the CI ear and noise to the normal ear (p<0.05), but remained poorer than that of NH controls (p<0.05). N1 peak amplitude measure in noise significantly increased after CI activation (p<0.05), but remained lower than that of NH controls (p<0.05) at 12 months. After 12 months of CI experience, cortical responses in noise became more comparable between groups.ConclusionBinaural restoration in SSD patients via cochlear implantation improved speech performance noise and cortical responses. While behavioral performance and cortical auditory responses improved, SSD-CI outcomes remained poorer than that of NH controls in most cases, suggesting only partial restoration of binaural hearing.

Electrophysiological Dynamics of Visual-Tactile Temporal Order Perception in Early Deaf Adults.

Studies of compensatory plasticity in early deaf (ED) individuals have mainly focused on unisensory processing, and on spatial rather than temporal coding. However, precise discrimination of the temporal relationship between stimuli is imperative for successful perception of and interaction with the complex, multimodal environment. Although the properties of cross-modal temporal processing have been extensively studied in neurotypical populations, remarkably little is known about how the loss of one sense impacts the integrity of temporal interactions among the remaining senses. To understand how auditory deprivation affects multisensory temporal interactions, ED and age-matched normal hearing (NH) controls performed a visual-tactile temporal order judgment task in which visual and tactile stimuli were separated by varying stimulus onset asynchronies (SOAs) and subjects had to discern the leading stimulus. Participants performed the task while EEG data were recorded. Group averaged event-related potential waveforms were compared between groups in occipital and fronto-central electrodes. Despite similar temporal order sensitivities and performance accuracy, ED had larger visual P100 amplitudes for all SOA levels and larger tactile N140 amplitudes for the shortest asynchronous (± 30 ms) and synchronous SOA levels. The enhanced signal strength reflected in these components from ED adults are discussed in terms of compensatory recruitment of cortical areas for visual-tactile processing. In addition, ED adults had similar tactile P200 amplitudes as NH but longer P200 latencies suggesting reduced efficiency in later processing of tactile information. Overall, these results suggest that greater responses by ED for early processing of visual and tactile signals are likely critical for maintained performance in visual-tactile temporal order discrimination.

Is it feasible to assess self-reported quality of life in individuals who are deaf and have intellectual disabilities?

PurposeThere is consensus that Quality of Life (QOL) should be obtained through self-reports from people with intellectual Disability (ID). Thus far, there have been no attempts to collect self-reported QOL from people who are deaf and have ID.MethodsBased on an established short measure for QOL (EUROHIS-QOL), an adapted easy-to-understand sign language interview was developed and applied in a population (n = 61) with severe-to-profound hearing loss and mild-to-profound ID. Self-reports were conducted at two time points (t1 and t2), 6 months apart. The Stark QOL, an established picture-based questionnaire, was also obtained at t2 and three Proxy ratings of QOL (from caregivers) were conducted for each participant at t1.ResultsSelf-reported QOL was successfully administered at both time points for 44 individuals with mild and moderate ID (IQ reference age between 3.3 and 11.8 years).The self-reports showed sufficient test–retest reliability and significant correlations with the Stark QOL. As anticipated, self-reported QOL was higher than proxy-reported QOL. Test–retest reliability and internal consistency were good for self-reported QOL.ConclusionReliable and valid self-reports of QOL can be obtained from deaf adults with mild-moderate ID using standard inventories adapted to the linguistic and cognitive level of these individuals.

Single-centre experience and practical considerations of the benefit of a second cochlear implant in bilaterally deaf adults

PurposeBilateral cochlear implant (CI) implantation is increasingly used in the auditory rehabilitation of bilaterally deafened adults. However, after successful unilateral implantation, objective patient counselling is essential.MethodsWe investigated the extra benefit of a second CI in adults in terms of health-related quality of life, tinnitus, stress, anxiety, depression, quality of hearing, and speech recognition. Hearing ability was assessed by using the Freiburg monosyllable speech discrimination test (FB MS) and the Oldenburg sentence test with azimuth variations. In a prospective patient cohort, we administered validated questionnaires before a CI, after a first CI and after a second CI implantation.ResultsThe study included 29 patients, made up of nine women and 20 men. The median time between the first and the second implantation was 23 months. The mean total NCIQ score and TQ before a CI improved significantly after both implantations. Stress, anxiety, and depression were stable over time and were not significantly affected by CI implantations. Speech recognition with noise significantly improved after the first and again after the second CI. Correlation analysis showed a strong connection between auditory performance and HRQoL.ConclusionWe demonstrated that a unilateral CI benefitted many fields and that the second sequential CI leads again to additional improvement. Bilateral CI implantation should, therefore, be the standard form of auditory rehabilitation in deafened adults.

Reorganized Brain White Matter in Early- and Late-Onset Deafness With Diffusion Tensor Imaging.

Individuals with early- and late-onset deafness showed different functional and morphological brain changes, but white matter alterations in both deaf groups still need to be elucidated. This study aimed to investigate changes in white matter integrity and white matter anatomical connectivity in both early- and late-onset deaf groups compared with hearing group. Diffusion tensor imaging data from 7 early-onset deaf (50.7 ± 6.5 years), 11 late-onset deaf (50.9 ± 12.3 years), and 9 hearing adults (48.9 ± 9.5 years) were preprocessed using FSL software. To find changes in white matter integrity, tract-based spatial statistics was used, which implemented on FSL software. Fractional anisotropy (FA), axial diffusivity (AD) and radial diffusivity (RD) were calculated and compared among the groups with age as a nuisance variable. To find out the effect of onset age or duration of deafness to the white matter integrity, onset-age or duration of deafness was treated as a variable of interest in the general linear model implemented on tract-based spatial statistics. White matter connectivity was constructed by a deterministic tractography and compared among the groups. In comparison to the hearing group, the early-onset deaf group did not show any significant changes but the late-onset deaf group showed decreased FA and increased RD in the several white matter areas. AD in the late-onset deaf group was not significantly different compared with the hearing group. The regions included the corpus callosum, posterior and superior corona radiata, internal capsule, posterior thalamic radiation, superior longitudinal fasciculus, and tapetum of the right hemisphere. Increased RD was also additionally observed in the right external capsule, fornix, and cerebral peduncle. The onset age or duration of deafness was not significantly correlated with the white matter integrity in the early-onset deaf group. In contrast, the onset age showed a significantly positive correlation with the RD, and a negative correlation with the FA, in the late-onset deaf group. The correlated white matter areas were also similar to the findings of comparison with the hearing group. In comparison to the hearing group, the early-onset deaf group did not show altered white matter connectivity, while the late-onset deaf group showed decreased white matter connectivity in between the right lingual and hippocampal areas. The present results suggest that late-onset deaf adults showed decreased FA and increased RD, and early-onset deaf adults showed no difference compared with the hearing group. In the late-onset deaf adults, onset-age showed a significantly positive correlation with RD and negative correlation with FA. Duration of deafness was not significantly correlated with the changes. Increased RD indicating demyelination occurred in the brain, and the changes were not limited to the auditory cortex but expanded to almost whole brain areas, suggesting significant effect of auditory deprivation on the brain later in life. The altered white matter connectivity in between the right limbic-occipital areas observed in the late-onset deaf group might be caused by altered language functions after auditory deprivation. Future studies are necessary incorporating functional and anatomical aspects of the brain changes in deaf group.

Cross-Sectional Analysis of Medical Conditions in the U.S. Deaf Transgender Community.

Purpose: This first U.S.-based, descriptive study of transgender Deaf adults looks to contribute to the gap in research regarding those who lie at the intersection of Deaf and transgender identities. The study objective is to identify characteristics that associate with medical conditions, including depression and anxiety disorders, among Deaf transgender adults. Methods: We gathered self-reported data from 74 Deaf transgender adults who used American Sign Language. Modified Poisson regression with robust standard errors was used to calculate relative risk estimates of having a medical condition among nonbinary individuals compared with gender binary individuals. Results: The sample lifetime prevalence for medical conditions in the Deaf transgender sample were as follows: 48.6% for depression/anxiety disorders, 28.8% for hypertension, 20.3% for lung conditions, 16.2% for arthritis/rheumatism, 12.3% for diabetes, 7.0% for cirrhosis/liver/kidney problems, 5.5% for heart conditions, and 2.7% for cancer. In cross-tabulation analysis across binary and nonbinary subsamples, the lifetime prevalence was significantly different only for depression and anxiety disorder with higher percentage in the nonbinary subsample. After adjusting for covariates in a regression model, identification as nonbinary increased a Deaf person's risk for being diagnosed with depression or anxiety disorder by 80% (95% confidence interval, 1.11-2.90) relative to Deaf people who self-identified as a binary gender. Conclusion: Study findings suggest that the Deaf transgender community is at risk for developing mental and physical health conditions.

Early deafness leads to re-shaping of functional connectivity beyond the auditory cortex

Early sensory deprivation, such as deafness, shapes brain development in multiple ways. Deprived auditory areas become engaged in the processing of stimuli from the remaining modalities and in high-level cognitive tasks. Yet, structural and functional changes were also observed in non-deprived brain areas, which may suggest the whole-brain network changes in deaf individuals. To explore this possibility, we compared the resting-state functional network organization of the brain in early deaf adults and hearing controls and examined global network segregation and integration. Relative to hearing controls, deaf adults exhibited decreased network segregation and an altered modular structure. In the deaf, regions of the salience network were coupled with the fronto-parietal network, while in the hearing controls, they were coupled with other large-scale networks. Deaf adults showed weaker connections between auditory and somatomotor regions, stronger coupling between the fronto-parietal network and several other large-scale networks (visual, memory, cingulo-opercular and somatomotor), and an enlargement of the default mode network. Our findings suggest that brain plasticity in deaf adults is not limited to changes in the auditory cortex but additionally alters the coupling between other large-scale networks and the development of functional brain modules. These widespread functional connectivity changes may provide a mechanism for the superior behavioral performance of the deaf in visual and attentional tasks.

Collaborating With Deaf Adults in Early Intervention

Collaborating With Deaf Adults in Early Intervention

A Survey of Post-Secondary School Deaf Adults Understanding of Mental Health Disorders in Ghana

ABSTRACT This study used an online survey to explore the knowledge and understanding of 19 post-secondary school deaf adults on Mental Health Disorders in Ghana. A purposive snowball sampling technique was used to circulate 30 questions online survey to the respondents. An analysis of results showed that most of the deaf participants perceived that evil spirits could cause mental disorders. Also, the participants were optimistic that the conditions of mental disorders could be improved upon through professional medical healthcare access. Furthermore, it was found out that communication barriers, followed by financial difficulty, were the most significant obstacles the deaf participants face in accessing mental health services. Conclusions were drawn and recommendations made based on the study findings.