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1.
Bettger J Emmorey K McCullough S Bellugi U 《Journal of deaf studies and deaf education》1997,2(4):223-233
On-line comprehension of American Sign Language (ASL) requires rapid discrimination of linguistic facial expressions. We hypothesized that ASL signers' experience discriminating linguistic facial expressions might lead to enhanced performance for discriminating among different faces. Five experiments are reported that investigate signers' and non-signers' ability to discriminate human faces photographed under different conditions of orientation and lighting (the Benton Test of Facial Recognition). The results showed that deaf signers performed significantly better than hearing non-signers. Hearing native signers (born to deaf parents) also performed better than hearing nonsigners, suggesting that the enhanced performance of deaf signers is linked to experience with ASL rather than to auditory deprivation. Deaf signers who acquired ASL in early adulthood did not differ from native signers, which suggests that there is no 'critical period' during which signers must be exposed to ASL in order to exhibit enhanced face discrimination abilities. When the faces were inverted, signing and nonsigning groups did not differ in performance. This pattern of results suggests that experience with sign language affects mechanisms specific to face processing and does not produce a general enhancement of visual discrimination. Finally, a similar pattern of results was found with signing and nonsigning children, 6-9 years old. Overall, the results suggest that the brain mechanisms responsible for face processing are somewhat plastic and can be affected by experience. We discuss implications of these results for the relation between language and cognition. 相似文献
2.
Modality of language shapes working memory: evidence from digit span and spatial span in ASL signers
Deaf children who are native users of American Sign Language (ASL) and hearing children who are native English speakers performed three working memory tasks. Results indicate that language modality shapes the architecture of working memory. Digit span with forward and backward report, performed by each group in their native language, suggests that the language rehearsal mechanisms for spoken language and for sign language differ in their processing constraints. Unlike hearing children, deaf children who are native signers of ASL were as good at backward recall of digits as at forward recall, suggesting that serial order information for ASL is stored in a form that does not have a preferred directionality. Data from a group of deaf children who were not native signers of ASL rule out explanations in terms of a floor effect or a nonlinguistic visual strategy. Further, deaf children who were native signers outperformed hearing children on a nonlinguistic spatial memory task, suggesting that language expertise in a particular modality exerts an influence on nonlinguistic working memory within that modality. Thus, language modality has consequences for the structure of working memory, both within and outside the linguistic domain. 相似文献
3.
Signposts to development: theory of mind in deaf children 总被引：5，自引：0，他引：5
Possession of a "theory of mind" (ToM)--as demonstrated by an understanding of the false beliefs of others--is fundamental in children's cognitive development. A key question for debate concerns the effect of language input on ToM. In this respect, comparisons of deaf native-signing children who are raised by deaf signing parents with deaf late-signing children who are raised by hearing parents provide a critical test. This article reports on two studies (N = 100 and N = 39) using "thought picture" measures of ToM that minimize verbal task-performance requirements. These studies demonstrated that even when factors such as syntax ability, mental age in spatial ability, and executive functioning were considered, deaf late signers still showed deficits in ToM understanding relative to deaf native signers or hearing controls. Even though the native signers were significantly younger than a sample of late signers matched for spatial mental age and scores on a test of receptive sign language ability, native signers outperformed late signers on pictorial ToM tasks. The results are discussed in terms of access to conversation and extralinguistic influences on development such as the presence of sibling relationships, and suggest that the expression of a ToM is the end result of social understanding mediated by early conversational experience. 相似文献
4.
对于出生在聋人父母家庭里的聋儿来说,跟他们的父母习得手语就如同健听儿跟他们的健听父母习得口语一样自然而轻松。那么作为一种以完全不同的形式——通过视觉手势而非听说形式来表现的语言,自然手语的习得与有声语言的习得又有何异同呢?文章以英语和美国手语为例对有声语言习得和聋人手语习得过程进行了比较和分析;文章还探讨了自然手语习得研究对聋儿早期语言发展的启示。 相似文献
5.
Recent research into signed languages indicates that signs may share some properties with gesture, especially in the use of space in classifier constructions. A prediction of this proposal is that there will be similarities in the representation of motion events by sign-naive gesturers and by native signers of unrelated signed languages. This prediction is tested for deaf native signers of Australian Sign Language (Auslan), deaf signers of Taiwan Sign Language (TSL), and hearing nonsigners using the Verbs of Motion Production task from the Test Battery for American Sign Language (ASL) Morphology and Syntax. Results indicate that differences between the responses of nonsigners, Auslan signers, and TSL signers and the expected ASL responses are greatest with handshape units; movement and location units appear to be very similar. Although not definitive, these data are consistent with the claim that classifier constructions are blends of linguistic and gestural elements. 相似文献
6.
There are at least two languages (American Sign Language [ASL], English) and three modalities (sign, speech, print) in most deaf individuals' lives. Mixing of ASL and English in utterances of deaf adults has been described in various ways (pidgins, diglossia, language contact, bilingualism), but children's mixing usually is treated as the 'fault' of poor input language. Alternatively, how might language mixing serve their communication goals? This article describes code variations and adaptations to particular situations. Deaf children were seen to exhibit a wide variety of linguistic structures mixing ASL, English, Spanish, signing, and speaking. Formal lessons supported a recoding of English print as sign and speech, but the children who communicated English speech were the two who could hear speech. The children who communicated ASL were those who had deaf parents communicating ASL or who identified with deaf houseparents communicating ASL. Most language produced by the teacher and children in this study was mixed in code and mode. While some mixing was related to acquisition and proficiency, mixing, a strategy of many deaf individuals, uniquely adapts linguistic resources to communication needs. Investigating deaf children's language by comparing it to standard English or ASL overlooks the rich strategies of mixing that are central to their communication experience. 相似文献
7.
Theory-of-mind (ToM) abilities were studied in 176 deaf children aged 3 years 11 months to 8 years 3 months who use either American Sign Language (ASL) or oral English, with hearing parents or deaf parents. A battery of tasks tapping understanding of false belief and knowledge state and language skills, ASL or English, was given to each child. There was a significant delay on ToM tasks in deaf children of hearing parents, who typically demonstrate language delays, regardless of whether they used spoken English or ASL. In contrast, deaf children from deaf families performed identically to same-aged hearing controls (N=42). Both vocabulary and understanding syntactic complements were significant independent predictors of success on verbal and low-verbal ToM tasks. 相似文献
8.
Written texts produced by 10 Italian deaf native signers in four different writing tasks were analyzed. Data analysis focused on linguistic and orthographic nonstandard forms. The written production of deaf subjects with deaf parents (DD) was compared to the written production in two control groups: a group of 10 hearing subjects with deaf parents (HD) and a group of 10 subjects who have had no contact with deaf people or sign language (HH). The results duplicate findings from previous studies. Deaf subjects display a pattern of selective difficulty with Italian grammatical morphology, especially with free-standing function words. The four different writing tasks used in the present study yield results indicating that text type does influence our assessment of deaf writing abilities. A comparison of the texts written by deaf native signers with those of two hearing groups confirms the view that difficulties in the acquisition of written Italian are best explained by deafness itself, not by the influence of a previously acquired Sign Language, and that the specific difficulties with grammatical morphology displayed by our deaf subjects cannot be attributed solely to their limited experience with written Italian. 相似文献
9.
Most T 《American annals of the deaf》2003,148(4):308-314
The language effects on repair strategies employed by 7 bilingual deaf children (native signers who also used spoken language) was examined. During two sessions--one conducted in sign language and the other in spoken language--each child described a picture. The examiner stopped the child twice to request clarification. The children's responses to the requests were coded into seven repair strategies. Results indicated that language mode significantly influenced repair strategy behavior: In sign language, the children used a greater frequency, variety, and level of strategies. The position of the clarification request also had an effect: Later in the sequence, the children used more advanced strategies. It was assumed that these native signers evidenced a higher language level in sign, which allowed them to use more advanced communicational strategies in sign than in spoken language. This performance gap should be considered in intervention. 相似文献
10.
As part of a longitudinal study, the conversational skills of 67 deaf adolescents were assessed in spoken English, simultaneous communication (SimCom) and American Sign Language (ASL). Two groups of students were identified on the basis of the communication used in their current educational program: a small group of 16 students in programs using spoken English (oral) and a larger group of 51 students in programs using sign communication (bimodal). Students in spoken English programs had good spoken English skills and limited ASL skills, whereas the reverse was true for students in bimodal programs. Most students demonstrated sufficient skill in one or more systems to meet basic interpersonal communications needs, but not those required for advanced academic discourse. In neither group was spoken English related to ASL skill. SimCom skills were strongly related to spoken English in the oral program group and to ASL in the bimodal program group. Spoken English in adolescence was highly predictable from spoken English in early childhood. Within the bimodal program group, students with deaf parents had better SimCom and ASL skills than those with hearing parents. Among bimodal program students with hearing parents, better SimCom skills (but not ASL skills) were associated with earlier introduction to sign communication in school and to mothers' use of sign communication. 相似文献
11.
Corina D 《Journal of deaf studies and deaf education》1998,3(1):35-48
The ability to comprehend and produce language stands as a defining characteristic of human cognition and enables the transfer of knowledge and culture within human society. A proper characterization of the human capacity for language is required for the development of interventions that may be used to assist those individuals who have failed to achieve, or who have lost competence in, language behaviors. For signed languages, models of competent language use are lacking. This lack of knowledge hampers the development of effective assessment measures for deaf children who may be experiencing learning problems beyond those confronting the normal deaf child. I discuss two research avenues that have begun to provide a window into the neural systems involved in sign language processing: studies of language disruptions in adult deaf signers who have suffered brain injury, and studies of functional brain imaging in normal deaf signers. This research provides a basis for the development of a comprehensive neurocognitive model of sign language processing. 相似文献
12.
This study examines a wide range of numerical representations (i.e., quantity, knowledge of multiplication facts, and use of parity information) in adult deaf signers. We introduce a modified version of the number bisection task, with sequential stimulus presentation, which allows for a systematic examination of mathematical skills in deaf individuals in different modalities (number signs in streaming video vs. Arabic digit displays). Reaction times and accuracy measures indicated that deaf signers make use of several representations simultaneously when bisecting number triplets, paralleling earlier findings in hearing individuals. Furthermore, some differences were obtained between the 2 display modalities, with effects being less prominent in the Arabic digit mode, suggesting that mathematical abilities in deaf signers should be assessed in their native sign language. 相似文献
13.
Courtin C 《Journal of deaf studies and deaf education》2000,5(3):266-276
The ability to attribute false beliefs (i.e., demonstrate theory of mind) by 155 deaf children between 5 and 8 years of age was compared to that of 39 hearing children ages 4 to 6. The hypotheses under investigation were (1) that linguistic features of sign language could promote the development of theories of mind and (2) that early exposure to language would allow an easier access to these theories. Deaf children were grouped according to their communication mode and the hearing status of their parents. The results obtained in three false belief tasks supported the hypotheses: effective representational abilities were demonstrated by deaf children of deaf parents, whereas those born to hearing parents appeared delayed in that regard, with differences according to their communication mode. 相似文献
14.
Several previous studies have shown that ASL signers are 'experts' on at least one test of face processing: the Benton Test of Face Recognition, a discrimination task that requires subjects to select a target face from a set of faces shown in profile and/or in shadow. The experiments reported here were designed to discover why ASL signers have superior skill as measured by this test and to investigate whether enhanced performance extends to other aspects of face processing. Experiment 1 indicated that the enhancement in face-processing skills does not extend to recognition of faces from memory. Experiment 2 revealed that deaf and hearing subjects do not differ in their gestalt face-processing ability; they perform similarly on a closure test of face perception. Finally, experiment 3 suggested that ASL signers do exhibit a superior ability to detect subtle differences in facial features. This superior performance may be linked both to experience discriminating ASL grammatical facial expression and to experience with lipreading. We conclude that only specific aspects of face processing are enhanced in deaf signers: those skills relevant to detecting local feature configurations that must be generalized over individual faces. 相似文献
15.
Susan Goldin-Meadow Rachel I. Mayberry 《Learning disabilities research & practice》2001,16(4):222-229
Reading requires two related, but separable, capabilities: (1) familiarity with a language, and (2) understanding the mapping between that language and the printed word (Chamberlain & Mayberry, 2000; Hoover & Gough, 1990). Children who are profoundly deaf are disadvantaged on both counts. Not surprisingly, then, reading is difficult for profoundly deaf children. But some deaf children do manage to read fluently. How? Are they simply the smartest of the crop, or do they have some strategy, or circumstance, that facilitates linking the written code with language? A priori one might guess that knowing American Sign Language (ASL) would interfere with learning to read English simply because ASL does not map in any systematic way onto English. However, recent research has suggested that individuals with good signing skills are not worse, and may even be better, readers than individuals with poor signing skills (Chamberlain & Mayberry, 2000). Thus, knowing a language (even if it is not the language captured in print) appears to facilitate learning to read. Nonetheless, skill in signing does not guarantee skill in reading—reading must be taught. The next frontier for reading research in deaf education is to understand how deaf readers map their knowledge of sign language onto print, and how instruction can best be used to turn signers into readers. 相似文献
16.
This article presents a study that examined the impact of visual communication on the quality of the early interaction between deaf and hearing mothers and fathers and their deaf children aged between 18 and 24 months. Three communication mode groups of parent-deaf child dyads that differed by the use of signing and visual-tactile communication strategies were involved: (a) hearing parents communicating with their deaf child in an auditory/oral way, (b) hearing parents using total communication, and (c) deaf parents using sign language. Based on Loots and colleagues' intersubjective developmental theory, parent-deaf child interaction was analyzed according to the occurrence of intersubjectivity during free play with a standard set of toys. The data analyses indicated that the use of sign language in a sequential visual way of communication enabled the deaf parents to involve their 18- to 24-month-old deaf infants in symbolic intersubjectivity, whereas hearing parents who hold on to oral-only communication were excluded from involvement in symbolic intersubjectivity with their deaf infants. Hearing parents using total communication were more similar to deaf parents, but they still differed from deaf parents in exchanging and sharing symbolic and linguistic meaning with their deaf child. 相似文献
17.
18.
In the few studies that have been conducted, researchers have typically found that deaf adolescents have more mental health difficulties than their hearing peers and that, within the deaf groups, those who use spoken language have better mental health functioning than those who use sign language. This study investigated the hypotheses that mental health functioning in adolescence is related to an early and consistent mode match between mother and child rather than to the child's use of speech or sign itself. Using a large existing 15-year longitudinal database on children and adolescents with severe and profound deafness, 57 adolescents of hearing parents were identified for whom data on language experience (the child's and the mother's) and mental health functioning (from a culturally and linguistically adapted form of the Achenbach Youth Self Report) was available. Three groups were identified: auditory/oral (A/O), sign match (SM), and sign mismatch (SMM). As hypothesized, no significant difference in mental health functioning was found between the A/O and SM groups, but a significant difference was found favoring a combined A/O and SM group over the SMM group. These results support the notion of the importance of an early and consistent mode match between deaf children and hearing mothers, regardless of communication modality. 相似文献
19.
Komesaroff L 《Journal of deaf studies and deaf education》2004,9(2):210-218
This paper examines the use of the Disability Discrimination Act (Commonwealth of Australia, 1992) by parents seeking access for their deaf children to native sign language in the classroom. It reviews a number of cases in which Australian parents have claimed indirect discrimination by educational authorities over their children's lack of access to instruction through Australian Sign Language (Auslan) and discusses the outcomes of such litigation. The policies endorsed by deafness organizations are contrasted with those of state educational authorities. The author discusses the limitations of a complaints-based system to address systemic discrimination and suggests the need for legislation to protect the linguistic rights of deaf children. 相似文献
20.
Siblings and theory of mind in deaf native signing children 总被引：5，自引：0，他引：5
We report a study designed to examine the basis of "theory of mind" (ToM) reasoning in deaf children who are native signers of British Sign Language. The participants were 20 native signers (aged 4-8 years) and their siblings. The children were given a measure of the quality of sibling relations together with a referential communication test concerning physical representations of objects and people. Sibling quality as perceived by siblings predicted children's ToM scores over and above age and referential communication. We conclude that the process of ToM understanding is linked to positive sibling relations that may permit access to knowledge about the inner worlds of beliefs and other mental states. 相似文献