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PubMed2001

Virtual reality as a tool for improving spatial rotation among deaf and hard-of-hearing children.

The aim of this study was to investigate whether the practice of rotating Virtual Reality (VR) three-dimensional (3D) objects will enhance the spatial rotation thinking of deaf and hard-of-hearing children compared to the practice of rotating two-dimensional (2D) objects. Two groups were involved in this study: an experimental group, which included 21 deaf and hardof-hearing children, who played a VR 3D game, and a control group of 23 deaf and hard-of-hearing children, who played a similar 2D (not VR) game. The results clearly indicate that practicing with VR 3D spatial rotations significantly improved the children's performance of spatial rotation, which enhanced their ability to perform better in other intellectual skills as well as in their sign language skills.

Child↗

PubMed1995

How to work with an interpreter.

The Audit Commission recently highlighted the need for health services to plan language services to help the problems of poor communication facing non-English speaking patients. Doctors and other health workers need to know how to work effectively when interviewing patients with an interpreter. This article describes the different options for helping non-English speaking patients; explains how interviews should be conducted with a trained interpreter, including those using sign language; and outlines the extent of interpreting services currently available in the United Kingdom, complete with a list of addresses of organisations offering interpreting services.

Communication↗

PubMed2005

From monkey-like action recognition to human language: an evolutionary framework for neurolinguistics.

The article analyzes the neural and functional grounding of language skills as well as their emergence in hominid evolution, hypothesizing stages leading from abilities known to exist in monkeys and apes and presumed to exist in our hominid ancestors right through to modern spoken and signed languages. The starting point is the observation that both premotor area F5 in monkeys and Broca's area in humans contain a "mirror system" active for both execution and observation of manual actions, and that F5 and Broca's area are homologous brain regions. This grounded the mirror system hypothesis of Rizzolatti and Arbib (1998) which offers the mirror system for grasping as a key neural "missing link" between the abilities of our nonhuman ancestors of 20 million years ago and modern human language, with manual gestures rather than a system for vocal communication providing the initial seed for this evolutionary process. The present article, however, goes "beyond the mirror" to offer hypotheses on evolutionary changes within and outside the mirror systems which may have occurred to equip Homo sapiens with a language-ready brain. Crucial to the early stages of this progression is the mirror system for grasping and its extension to permit imitation. Imitation is seen as evolving via a so-called simple system such as that found in chimpanzees (which allows imitation of complex "object-oriented" sequences but only as the result of extensive practice) to a so-called complex system found in humans (which allows rapid imitation even of complex sequences, under appropriate conditions) which supports pantomime. This is hypothesized to have provided the substrate for the development of protosign, a combinatorially open repertoire of manual gestures, which then provides the scaffolding for the emergence of protospeech (which thus owes little to nonhuman vocalizations), with protosign and protospeech then developing in an expanding spiral. It is argued that these stages involve biological evolution of both brain and body. By contrast, it is argued that the progression from protosign and protospeech to languages with full-blown syntax and compositional semantics was a historical phenomenon in the development of Homo sapiens, involving few if any further biological changes.

Animal Communication↗

PubMed2006

[Diagnosis and therapy of audiogenic communication development].

The diagnosis and therapy of audiogenic communication development require close interdisciplinary cooperation between physicians, specialist teachers, psychologists, psycholinguists, speech-language pathologists and logopedists. With regard to the treatment of speech problems, initial emphasis is on the development of an understanding of speech, enlargement of vocabulary, promotion of auditive discrimination and the development of syntax. In the case of deaf children too, promotion of speech communication by means of sounds is to the fore. However, the use of an additional sign language should not be denied a deaf child. The decision whether a def child should be sent to a "normal" School or to a special institution for the deaf will be determined largely by the speech competence of the child, and will include his/her intellectual, emotional and social skills. The aim of all supportive measures is to achieve the full integration of hearing-impaired children in society.

Child↗

PubMed2006

[Model oriented assessment of literacy performance in children with cochlear implants].

BACKGROUND: Although most hearing-impaired children lag behind normally hearing children in literacy acquisition, this aspect has hardly been addressed in the evaluation of language acquisition after cochlear implantation. The present study investigated written language abilities in 8 school-age children with cochlear implants. Neurolinguistic dual-route-models of written language processing indicate that literacy acquisition leads to the establishment of two distinct reading and writing strategies: a lexical one for the quick processing of known words and a sublexical one for decoding unfamiliar words or nonwords letter by letter. PATIENTS: 8 school-aged children were investigated, a very heterogeneous group concerning age of onset of hearing impairment, educational placement, and competences in sign language. However, this range is typical of the group of CI-children. METHODS: The aim was to investigate if children with cochlear implants are able to establish both strategies or if they need to find a differential and individual access to written language. Performance within the Salzburger Lese-Rechtschreib-Test was evaluated. Individual performance of each subject was analysed. RESULTS: Performance varied substantially ranging from only rudimentary spoken and written language abilities in two children to age-equivalent performance in three of them. Severe qualitative differences in written language processing were shown in the remaining three subjects. Suggestions for remediation were made and a re-test was carried out after 12 months. Their individual profiles of performance are described in detail. CONCLUSIONS: The present study stresses the importance of a thorough investigation of written language performance in the evaluation of language acquisition after cochlear implantation. The results draw a very heterogeneous picture of performance. Model-oriented testing and analysis of performance prove to be sensible in at least a subpopulation of children with cochlear implants. Based on a better understanding of their acquired word-processing strategies, remediation programs meeting the needs of each individual child can be derived.

Age Factors↗

PubMed1985

Signs of intelligence in cross-fostered chimpanzees.

In cross-fostering, the young of one species are reared by adults of another, as in the classical ethological studies of imprinting and song-learning. In our laboratory, infant chimpanzees were reared under human conditions that included two-way communication in American Sign Language (A.S.L.), the gestural language of the deaf in North America. A large body of evidence from five chimpanzees demonstrated stage by stage replication of basic aspects of the acquisition of speech and signs by hearing and deaf children. Here we review evidence that, under double-blind conditions: (i) the chimpanzees communicated information in A.S.L. to human observers; (ii) independent human observers agreed in their identification of the chimpanzee signs, (iii) the chimpanzees could use the signs to refer to natural language categories: DOG for any dog, FLOWER for any flower, SHOE for any shoe.

Animals↗

PubMed2005

Neural substrates for verbal working memory in deaf signers: fMRI study and lesion case report.

The nature of the representations maintained in verbal working memory is a topic of debate. Some authors argue for a modality-dependent code, tied to particular sensory or motor systems. Others argue for a modality-neutral code. Sign language affords a unique perspective because it factors out the effects of modality. In an fMRI experiment, deaf participants viewed and covertly rehearsed strings of non-sense signs; analyses focused on regions responsive in both sensory and rehearsal phases. Compared with previous findings in hearing subjects, deaf subjects showed a significantly increased involvement of parietal regions. A lesion case study indicates that this network is left-dominant. The findings support the hypothesis that linguistic working memory is supported by modality-specific neural systems, but some modality-neutral systems may also be involved.

Brain Mapping↗

PubMed2005

Improving the Deaf community's access to prostate and testicular cancer information: a survey study.

BACKGROUND: Members of the Deaf community face communication barriers to accessing health information. To resolve these inequalities, educational programs must be designed in the appropriate format and language to meet their needs. METHODS: Deaf men (102) were surveyed before, immediately following, and two months after viewing a 52-minute prostate and testicular cancer video in American Sign Language (ASL) with open text captioning and voice overlay. To provide the Deaf community with information equivalent to that available to the hearing community, the video addressed two cancer topics in depth. While the inclusion of two cancer topics lengthened the video, it was anticipated to reduce redundancy and encourage men of diverse ages to learn in a supportive, culturally aligned environment while also covering more topics within the partnership's limited budget. Survey data were analyzed to evaluate the video's impact on viewers' pre- and post-intervention understanding of prostate and testicular cancers, as well as respondents' satisfaction with the video, exposure to and use of early detection services, and sources of cancer information. RESULTS: From baseline to immediately post-intervention, participants' overall knowledge increased significantly, and this gain was maintained at the two-month follow-up. Men of diverse ages were successfully recruited, and this worked effectively as a support group. However, combining two complex cancer topics, in depth, in one video appeared to make it more difficult for participants to retain as many relevant details specific to each cancer. Participants related that there was so much information that they would need to watch the video more than once to understand each topic fully. When surveyed about their best sources of health information, participants ranked doctors first and showed a preference for active rather than passive methods of learning. CONCLUSION: After viewing this ASL video, participants showed significant increases in cancer understanding, and the effects remained significant at the two-month follow-up. However, to achieve maximum learning in a single training session, only one topic should be covered in future educational videos.

Adult↗

PubMed1994

Deaf children reading fables: using ASL summaries to improve reading comprehension.

This study was a cooperative effort of two university-based reading educators and a reading teacher-librarian who is deaf. An intervention technique was designed based on studies emphasizing the importance of using American Sign Language (ASL) to build deaf children's background knowledge before they read materials that support the learning of English. The teacher used the ASL summary technique; that is, she signed a summary of a fable in ASL without giving the moral lesson before having the students read the fable in printed English. "Retelling scores" were computed for seven deaf elementary school students who read some fables with the ASL intervention and read other fables without the intervention. The students' responses in telling the moral lesson of each fable were also scored. The data showed that the ASL summary technique increased the quantity and quality of the retelling scores; it also improved deaf readers' comprehension of the moral lessons of the fables. A description of the ASL summary technique and a discussion of its implications for teachers are provided.

Child↗

PubMedDate not supplied

Temporal characteristics of speech produced by inexperienced signers during simultaneous communication.

This study investigated temporal characteristics of speech produced during simultaneous communication (SC) by inexperienced signers. Recordings of stimulus words embedded in sentences produced with speech-only versus SC were made by 12 students during the first and last weeks of an introductory sign language course. Results indicated significant temporal differences between speech-only and SC conditions during both the first week and the last week of the class. Inexperienced signers appeared to sign between words in SC during the first week of the class, thereby extending interword intervals. At the last week of the class, they appeared to shift toward simultaneously signing while producing the words, thereby elongating segmental temporal characteristics, such as vowel duration. The specific temporal differences between SC and speech-only conditions were consistent with previous findings regarding the effect of SC on temporal characteristics of speech with experienced signers.

Communication↗

PubMed1989

Isolated sign vocabulary acquisition by hearing adults: CAI vs. videotaped presentation.

The present study was designed to examine receptive learning of 30 ASL signs using two teaching modes. Subjects were 28 college students with normal hearing, naive to sign language, who were trained under computer-assisted instruction (CAI) or through videotaped presentation (VT). The results indicated significantly (p less than .01) higher scores under the VT condition when sign learning and retention were probed three and 10 days after training.

Adult↗

PubMed2003

Neurolinguistic development in deaf children: the effect of early language experience.

Recent investigations have indicated a relationship between the development of cerebral lateralization for processing language and the level of development of linguistic skills in hearing children. The research on cerebral lateralization for language processing in deaf persons is compatible with this view. We have argued that the absence of appropriate input during a critical time window creates a risk for deaf children that the initial bias for left-hemisphere specialization will be distorted or disappear. Two experiments were conducted to test this hypothesis The results of these investigations showed that children educated early and intensively with cued speech or with sign language display more evidence of left-hemisphere specialization for the processing of their native language than do those who have been exposed later and less intensively to those languages.

Adult↗

PubMed1998

Ethics of cochlear implantation in young children: a review and reply from a Deaf-World perspective.

This article examines ethical dilemmas related to cochlear implant surgery in children. These dilemmas arise from the existence of a linguistic and cultural minority called the Deaf World. Organizations of culturally Deaf adults in the United States and abroad, as well as the World Federation of the Deaf, have, on ethical grounds, strongly criticized the practice of cochlear implant surgery in children. Three ethical dilemmas are examined. (1) The surgery is of unproven value for the main significant benefit sought, language acquisition, whereas the psychological, social, and linguistic risks have not been assessed. Thus the surgery appears to be innovative, but innovative surgery on children is ethically problematic. (2) It is now widely recognized that the signed languages of the world are full-fledged natural languages, and the communities that speak those languages have distinct social organizations and cultures. Deaf culture values lead to a different assessment of pediatric cochlear implant surgery than do mainstream (hearing) values, and both sets of values have standing. (3) The fields of otology and audiology want to provide cochlear implants to Deaf children but also, their leaders say, want to protect Deaf culture; those appear to be conflicting goals in principle because, if there were perfect implants, the ranks of the Deaf World would diminish.

Adult↗

PubMed1986

Vocal and gestural responses of cross-fostered chimpanzees.

Ten positive, five neutral, and five negative events were presented to two chimpanzees, Tatu (female, 64 months old) and Dar (male, 56 months old), who had been cross-fostered from birth by human beings. Each event was announced in American Sign Language 10 s before. The announcements and events were common items in the cross-fostering routines and were administered according to a balanced design over a period of 2 months. Vocal and signed responses to the announcements and to the events were recorded. The likelihood of either mode of response depended on affective charge, and the likelihood of vocal and signed responses was positively correlated. Signed responses were more likely than vocal responses; signed responses were more likely to be evoked by announcements than by events, whereas vocal responses were more likely to be evoked by events than by announcements. The type of vocal response depended on the affective charge and on whether the response was immediate (to the event) or anticipatory (to the announcement). Incorporation of signs and phrases from the announcements, and reiteration of signs and phrases within an utterance depended on affective charge, just as they do for human children.

Affect↗

PubMed1999

Reading? ... pah! (I got it!). Innovative Reading Technique For Successful Deaf Readers.

A reading program utilizing five components--a shortcut to phonemic awareness, Adapted Dolch words, Bridge lists and the Bridging process, reading comprehension, and American Sign Language development/language experience stories--was administered to 48 elementary school students at a residential school for the deaf. Data analyses reveal dramatic gains in students' reading levels and academic behavior, teachers' growth in reflective sign skills, and students' and teachers' overall growth in ASL skills, resulting in a more organized, consistent approach to linguistic input and usage.

Child↗

PubMed1991

ASL and the family system.

This paper examines some of the sociological implications of poor interaction on families in which one of the members is deaf. When a family systems perspective is used, once a child is diagnosed as deaf the family is no longer considered "hearing"; the parents may be hearing, the other children may be, but the family system becomes "hearing and deaf." By viewing this as a hearing/deaf problem, it becomes clear that no adequate solution can be found without the participation of deaf adults and the benefit of their perspectives and insights. We suggest that attention be directed toward neutralizing the effects of the stigma associated with deafness so that American Sign Language can become a pivotal tool for facilitating functional symbolic interaction in hearing/deaf families.

Child↗

PubMed2001

A fuzzy rule-based approach to recognizing 3-D arm movements.

One particular application of gesture-based systems is to implement a speaking aid for the deaf. For this to happen, it requires a module that can recognize three-dimensional (3-D) arm movements since arm movement is one of the four main attributes characterizing a sign word. In this paper we propose a fuzzy rule-based recognition method. The effectiveness of this system is evaluated by recognizing 3-D arm movements involved in Taiwanese Sign Language (TSL).

Arm↗

PubMed2006

"Seeing voices": fused visual/auditory verbal hallucinations reported by three persons with schizophrenia-spectrum disorder.

OBJECTIVE: The neurocognitive basis of verbal/auditory hallucinations remains uncertain. A leading hypothesis is that these hallucinations correspond to ordinary inner speech mislabeled as non-self. However, some studies suggest pathogenic activation of receptive language neurocircuitry as the cause. A form of visualized verbal hallucinations not previously reported in the literature is described that may shed light on this controversy. METHOD: Review of three cases. RESULTS: Two patients described visual hallucinations of speech-like lip and mouth movements fused with simultaneous auditory verbal hallucinations superimposed on perceptions of faces of actual persons in their immediate environment. A third patient described similar experiences incorporated into visual hallucinations of human figures who also exhibited finger and hand movements corresponding to American Sign Language. CONCLUSION: These fused, multimodal verbal hallucinations seem unlikely to be due to inner speech mislabeled as non-self, and instead suggest top-down re-shaping of activation in visual processing brain centers by pathogenically active receptive language neurocircuitry.

Adult↗