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Journal ArticleDOI

Discourse Deficits Following Right Hemisphere Damage in Deaf Signers

TL;DR: It is concluded that, as in the hearing population, discourse functions involve the right hemisphere; that distinct discourse functions can be dissociated from one another in ASL; and that brain organization for linguistic spatial devices is driven by its functional role in language processing, rather than by its surface, spatial characteristics.
About: This article is published in Brain and Language.The article was published on 1999-02-01 and is currently open access. It has received 44 citations till now. The article focuses on the topics: Spatial cognition & Spatial ability.
Citations
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Journal ArticleDOI
TL;DR: A case of a left-handed, deaf, life-long signer who became aphasic after a right-hemisphere lesion, which represents reversed lateralization for sign language and also may represent reversed lateralized for visuo-spatial abilities in a deaf signer.
Abstract: Recent lesion studies have shown that left hemisphere lesions often give rise to frank sign language aphasias in deaf signers, whereas right hemisphere lesions do not, suggesting similar patterns of hemispheric asymmetry for signed and spoken language. We present here a case of a left-handed, deaf, life-long signer who became aphasic after a right-hemisphere lesion. The subject exhibits deficits in sign language comprehension and production typically associated with left hemisphere damaged signers. He also exhibits evidence of local versus global deficits similar to left-hemisphere lesioned hearing patients. This case represents reversed lateralization for sign language and also may represent reversed lateralization for visuo-spatial abilities in a deaf signer.

9 citations


Cites result from "Discourse Deficits Following Right ..."

  • ...In contrast, those with RHD did not display aphasic characteristics; their language profiles were similar to agematched deaf controls (Poizner et al., 1987; Hickok et al., 1999, Hickok and Bellugi, 2001)....

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Journal ArticleDOI
TL;DR: The linguistic and cognitive profiles of five deaf adults with a sign language disorder were compared with those of matched deaf controls and the important role of narrative discourse as a clinically sensitive diagnostic tool is described.
Abstract: The linguistic and cognitive profiles of five deaf adults with a sign language disorder were compared with those of matched deaf controls. The test involved a battery of sign language tests, a signed narrative discourse task and a neuropsychological test protocol administered in sign language. Spatial syntax and facial processing were examined in detail and correlated with language and cognitive findings. The battery clearly differentiated the performance of the clinical participants from that of the normal controls. Further, test performance of the clinical individuals was distinct and showed marked correlations with neurological history, as well as with cognitive profiles. The important role of narrative discourse as a clinically sensitive diagnostic tool is described.

8 citations


Cites result from "Discourse Deficits Following Right ..."

  • ...This confirmed the findings of Hickok et al. (1999) and Corina et al. (1996) regarding signed discourse deficits in their RHD subjects....

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  • ..., 2002; Newman, Bavelier, Corina, Jezzard, & Neville, 2002; Campbell & Woll, 2003; Atkinson, Campbell, Marshall, Thacker, & Woll, 2004) as well as with aspects of signed discourse (Hickok et al., 1999; Corina et al., 1999)....

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  • ...…2002; 2005; Loew, Kegl, & Poizner, 1997; Corina, 1998; MacSweeney et al., 2002; Newman, Bavelier, Corina, Jezzard, & Neville, 2002; Campbell & Woll, 2003; Atkinson, Campbell, Marshall, Thacker, & Woll, 2004) as well as with aspects of signed discourse (Hickok et al., 1999; Corina et al., 1999)....

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Journal ArticleDOI
TL;DR: The identified trends based on analysis of almost 2000 papers clearly show that technology developments, especially in image processing and deep learning, are driving new applications and tools that improve the various performance metrics in these sign language-related task.
Abstract: Sign languages are critical in conveying meaning by the use of a visual-manual modality and are the primary means of communication of the deaf and hard of hearing with their family members and with the society. With the advances in computer graphics, computer vision, neural networks, and the introduction of new powerful hardware, the research into sign languages has shown a new potential. Novel technologies can help people learn, communicate, interpret, translate, visualize, document, and develop various sign languages and their related skills. This paper reviews the technological advancements applied in sign language recognition, visualization, and synthesis. We defined multiple research questions to identify the underlying technological drivers that strive to improve the challenges in this domain. This study is designed in accordance with the PRISMA methodology. We searched for articles published between 2010 and 2021 in multiple digital libraries (i.e., Elsevier, Springer, IEEE, PubMed, and MDPI). To automate the initial steps of PRISMA for identifying potentially relevant articles, duplicate removal and basic screening, we utilized a Natural Language Processing toolkit. Then, we performed a synthesis of the existing body of knowledge and identified the different studies that achieved significant advancements in sign language recognition, visualization, and synthesis. The identified trends based on analysis of almost 2000 papers clearly show that technology developments, especially in image processing and deep learning, are driving new applications and tools that improve the various performance metrics in these sign language-related task. Finally, we identified which techniques and devices contribute to such results and what are the common threads and gaps that would open new research directions in the field.

8 citations

Journal ArticleDOI
TL;DR: The data suggest that current symptom models of schizophrenia are valid in both hearing and deaf patients, however, relations between symptoms, cognition, and outcome from the general (hearing) literature cannot be generalised to deaf patients.
Abstract: Introduction. There has been a relative lack of research on deaf people with schizophrenia, and no data exist regarding symptom structure in this population. Thus, we determined the factor structure of the 24-item Brief Psychiatric Rating Scale (BPRS) in deaf (n=34) and hearing (n=31) people with schizophrenia and compared it to a standard four-factor solution. Method. An obliquely rotated factor analysis produced a solution for the BPRS that resembled others in the literature. Symptom clusters were additionally compared to cognitive and social-cognitive abilities. Results. Activity and disorganised symptoms were the most consistent correlates of visual- and thought and language-related skills for deaf and hearing subjects respectively. Affective symptoms and facial affect processing were positively correlated among deaf but not hearing subjects. Conclusions. The data suggest that current symptom models of schizophrenia are valid in both hearing and deaf patients. However, relations between symptoms, cogn...

7 citations


Cites background from "Discourse Deficits Following Right ..."

  • ...This area of research has the potential to reveal whether double disassociations exist in clinical deaf and hearing samples, as they do in nonclinical samples, between linguistic and nonlinguistic cognitive processing (see e.g., Tucker 1992; Campbell, 1997; Neville et al., 1998; Corina et al., 1999; Hickok et al., 1999)....

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  • ...…the potential to reveal whether double disassociations exist in clinical deaf and hearing samples, as they do in nonclinical samples, between linguistic and nonlinguistic cognitive processing (see, e.g., Campbell, 1997; Corina et al., 1999; Hickok et al., 1999; Neville et al., 1998; Tucker, 1992)....

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References
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Book
01 Jan 1979
TL;DR: The two faces of sign and sign language have been studied in this paper, where the authors compare Chinese and American signs and feature analysis of handshapes and the rate of speaking and signing.
Abstract: Introduction PART I: The Two Faces of Sign 1. Iconicity in Signs and Signing 2. Properties of Symbols in a Silent Language 3. Historical Change: From Iconic to Arbitrary PART II: The Structure of the Sign 4. Remembering without Words: Manual Memory 5. Slips of the Hands 6. A Comparison of Chinese and American Signs 7. A Feature Analysis of Handshapes 8. The Rate of Speaking and Signing PART III: Grammatical Processes 9. On the Creation of New Lexical Items by Compounding 10. Linguistic Expression of Category Levels 11. Aspectual Modulations on Adjectival Predicates 12. The Structured Use of Space and Movement: Morphological Processes PART IV: The Heightened Use of Language 13. Wit and Plays on Signs 14. Poetry and Song in a Language without Sound Appendix A: Notation Appendix B: Conventions Employed in Illustrations Notes References Index

1,598 citations


"Discourse Deficits Following Right ..." refers background in this paper

  • ...The sublexical units from which signs are composed are often articulated simultaneously rather than sequentially, and spatial location contrasts certain pairs of minimally different signs (Klima & Bellugi, 1979, Chap....

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  • ...2); morphological inflections of signs generally alter the movement path of the sign, rather than concatenating morphemic units across time (Klima & Bellugi, 1979, Chap....

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  • ...At the morphological level, ASL has grammatical markers that serve as inflectional and derivational morphemes; these are regular changes in form across classes of lexical items associated with systematic changes in meaning (Klima & Bellugi, 1979)....

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Book
01 Jan 1987
TL;DR: This paper showed that there are primary linguistic systems passed down from one generation of deaf people to the next, which have been forged into antonomous languages and are not derived from front spoken languages.
Abstract: What the Hands Reveal About the Brain provides dramatic evidence that language is not limited to hearing and speech, that there are primary linguistic systems passed down from one generation of deaf people to the next, which have been forged into antonomous languages and are not derived front spoken languages.

579 citations


"Discourse Deficits Following Right ..." refers background in this paper

  • ...…tasks, while the right lesioned signers exhibit marked deficits involving left neglect, loss of perspective, loss of the overall configuration of the figure, etc. (Hickok et al., 1995; Hickok et al., 1996; Poizner & Kegl, 1993; Bellugi, Poizner, & Klima, 1989, 1990; Poizner et al., 1987)....

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  • ...But while RHD signers do not present with aphasia for sign at the lexical, morphological, or syntactic level, they do show significant deficits in nonlinguistic visuospatial processing (Bellugi & Hickok, 1995; Hickok et al., 1996; Poizner et al., 1987)....

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  • ...The RHD deaf signers are much like the controls, while the LHD deaf signers show a range of different sign language aphasias (Poizner et al., 1987)....

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Book ChapterDOI
01 Jan 1985
TL;DR: The authors compare the acquisition of American Sign Language (ASLSA) with the acquisition process of spoken languages, and delineate those aspects of acquisition which are universal over languages of varying types, and those aspects which are specific to certain linguistic and modality-related typologies.
Abstract: American Sign Language (ASL) is a fully grammaticized language, not a pantomimic communication system, and it displays the various grammatical characteristics typically found in spoken languages of the world, despite the apparent potential for a different type of organization offered by the visual-gestural modalities. Unlike English, ASL is a morphologically complex language, perhaps most comparable to polysynthetic spoken languages. The study of ASL acquisition may shed unique light on language acquisition processes more generally: comparisons of the acquisition of American Sign Language with the acquisition of spoken languages may help to delineate those aspects of acquisition which are universal over languages of varying types, and those aspects of acquisition which are specific to certain linguistic and modality-related typologies. Before reviewing the literature on the acquisition of ASL, this chapter describes the structure of the language.

420 citations


"Discourse Deficits Following Right ..." refers background in this paper

  • ...They follow a well-defined developmental course, including a critical period for acquisition (Newport & Meier, 1985)....

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