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PubMed1999

Deaf murderers: clinical and forensic issues.

Data are reported on 28 deaf individuals who were convicted, pled guilty, or have been charged and awaiting trial for murder. The unique forensic issues raised by these cases are discussed, and their clinical picture presented. A significant percentage of these deaf murderers and defendants had such severely limited communication skills in both English and American Sign Language that they lacked the linguistic ability to understand the charges against them and/or to participate in their own defense. As such, they were incompetent to stand trial, due not to mental illness or mental retardation, but to linguistic deficits. This form of incompetence poses a dilemma to the courts that remains unresolved. This same linguistic disability makes it impossible for some deaf suspects to be administered Miranda Warnings in a way comprehensible to them. This paper identifies the reasons for the communication problems many deaf persons face in court and offers remedial steps to help assure fair trials and police interrogations for deaf defendants. The roles and responsibilities of psychiatric and psychological experts in these cases are discussed. Data are provided on the etiology of the 28 individuals' hearing losses, psychiatric/psychological histories, IQs, communication characteristics, educational levels, and victim characteristics.

Adolescent↗
PubMed1983

On recency and echoic memory.

In short-term memory, the tendency for the last few (recency) items from a verbal sequence to be increasingly well recalled is more pronounced if the items are spoken rather than written. This auditory recency advantage has been quite generally attributed to echoic memory, on the grounds that in the auditory, but not the visual, mode, sensory memory persists just long enough to supplement recall of the most recent items. This view no longer seems tenable. There are now several studies showing that an auditory recency advantage occurs not only in long-term memory, but under conditions in which it cannot possibly be attributed to echoic memory. Also, similar recency phenomena have been discovered in short-term memory when the items are lip-read, or presented in sign-language, rather than heard. This article provides a partial review of these studies, taking a broad theoretical position from which these particular recency phenomena are approached as possible exceptions, to a general theory according to which recency is due to temporal distinctiveness. Much of the fresh evidence reviewed is of a somewhat preliminary nature and it is as yet unexplained by any theory of memory. The need for additional, converging experimental tests is obvious; so too is the need for further theoretical development. Several alternative theoretical resolutions are mentioned, including the possibility that enhanced recency may reflect movement, from sequentially occurring stimulus features, and the suggestion that it may be associated with the primary linguistic mode of the individuals concerned. But special weight is attached to the conjecture that all these recency phenomena might be accounted for in terms of distinctiveness or discriminability. On this view, the enhanced recency effects observed with certain modes, including the auditory mode, are attributed to items possessing greater temporal discriminability in those modes.

Auditory Perception↗
PubMed1980

Culture and deafness in a Maya Indian village.

Over the years, the question of psychosocial adjustment among the deaf has attracted a great deal of attention. Pioneer work by Levine (1960, 1963); Rainer, Altshuler, and Kallmann (1963); Myklebust (1964); Rainer and Altshuler (1968); Grinker (1969); Mindel and Vernon (1971); and Schlesinger and Meadow (1972), to mention but a few, has aided our understanding of how the deaf adjust to the stress which their handicap imposes upon them. We know a great deal less, however, about the deaf in other societies. Altable (1947); Altshuler, Vollenweider, and Rainer (1971); Youniss (1974); and Sarfaty and Katz (1978) are among the handful of references which appear, and they all deal with urban populations. Kuschel (1973) considers a single deaf man on Rennell Island, in Polynesia, but his concern is primarily the sign language devised by this ingenious man. As far as I am aware, only Woodward (1978) and his associates have an ongoing program for the investigation of deafness in a nonurban society (Washabaugh, Woodward, and DeSantis, 1978). To neglect the way in which other societies handle these problems is to deprive ourselves of a rich source of comparative data. It is also to avoid a strenuous challenge, for the methodology that is appropriate for use in literate, urban societies may have little applicability in a tribal or peasant group. The purpose of this paper, therefore, is to present preliminary data on a group of profoundly, congenitally deaf Maya Indians of southeastern Mexico, with the aim of suggesting hypotheses which may be investigated by future research. The fieldwork upon which the report is based, however, was not part of a purposeful attempt to study the deaf of the village in question; rather, the village was selected as part of the Maya Film Project, directed by Hubert Smith, and at the time the project took to the field the fieldworkers had no idea that the village eventually chosen would contain a high number of deaf inhabitants.

Adolescent↗
PubMed1990

The effects of recoding and presentation format on recency and suffix effects.

The primary linguistic theory of Shand and Klima (1981) hypothesizes that stimuli that cannot be directly processed without recoding are not in the primary linguistic mode of the subject and thus should lead to lesser recency and associated suffix effects. In three experiments, different normal hearing subjects learned to pair American Sign Language (ASL) stimuli, visual "quasivocables" (QVs), word-like letter strings, and auditory QVs with common English words. In the first experiment, the subjects were given sequences of ASL or QV stimuli and required to recall the associated words in strict serial order. In two other experiments involving auditory and visual presentation, respectively, subjects who had never been given paired associate training were required to recall the English words that had previously been associated with the ASL and QV stimuli, in a standard suffix paradigm. The results showed recency and suffix effects to be present only with auditorily presented QVs and words. Contrary to the predictions of the primary linguistic hypothesis, greater recency and larger suffix effects were present with the auditory QVs than with the auditory words, although the QVs were not primary linguistic and the task involved forced recoding. Previous results showing recency with ASL stimuli in normal subjects were not replicated. It is concluded that recency and suffix effects are not related either to the primary linguistic mode of the subject or to stimulus recoding, as we and Shand and Klima have defined them.

Attention↗
PubMed1999

Interarticulator co-ordination in deaf signers with Parkinson's disease.

Motor control deficits in signers with Parkinson's disease (PD) were examined through analysis of their production of American Sign Language (ASL) fingerspelling, which is sequential and rapid motor behavior that has theoretical models of its underlying structure. Free conversation of two Deaf signers with PD and two Deaf control signers was analysed. In addition, scripted productions of one control signer were also analysed and directly compared to the same productions by the signers with PD. A featural analysis of ASL fingerspelling and a frame-by-frame analysis of multiple articulator movements were used to examine the fingerspelled productions. On the basis of the featural analysis, the signers with PD showed a variety of error patterns, all of which reflected attempts to reduce the motoric demands of coarticulation and thereby facilitate ease of articulation. Signers with PD either held individual segments in a fingerspelling sequence for a long time (segmentation), blended adjacent segments into a single segment (sequential blending), or broke handshapes down sequentially into their component features (featural unraveling). The results of both the featural analysis and the frame-by-frame analysis show that the PD signers have difficulty co-ordinating the movements of independent articulators in complex sequences. For example, the movements of independent articulators for fingerspelling (the thumb, fingers, and wrist) were markedly farther apart in time and more variable for the signers with PD. In addition, the signers with PD used fewer wrist movements while fingerspelling. Such deficits are consistent with claims that patients with PD are impaired in their ability to use ongoing sensorimotor information to program multi-articulator movements.

Aged↗
PubMed1993

The health status and health care utilization of deaf and hard-of-hearing persons.

OBJECTIVE: To evaluate whether health habits, self-reported health status, and communication with physicians play a role in the known altered health care utilization patterns of deaf and hard-of-hearing persons. DESIGN: A cross-sectional survey. Respondents were given the choice of completing either a self-administered written survey or an American Sign Language interview-administered survey. POPULATION: Eighty-seven deaf and hard-of-hearing members of various organizations serving this population in southeastern Michigan and 88 hearing patients from a family practice clinic in the same area. RESULTS: Deaf and hard-of-hearing persons visit physicians more frequently (P = .01), have a lower incidence of ever smoking tobacco (P < .0006) and of alcohol use (P = .04), have more difficulties communicating with physicians (P < .001), have trouble understanding physicians (P < .001), and feel less comfortable with physicians (P < .001). Lower current tobacco use among deaf and hard-of-hearing persons was only seen in persons who were not educated beyond high school. Increased frequency of physician visits for deaf and hard-of-hearing persons was especially noticeable in the group of persons 60 years of age and older. Our finding that use of interpreters is associated with increased utilization and decreased understanding suggests deaf and hard-of-hearing patients presenting with interpreters warrant more focused attention from physicians. Reasons for seeing physicians did not explain the difference in frequency of physician visits between the two groups. CONCLUSIONS: Deaf and hard-of-hearing persons report a lower subjective health status and higher physician utilization, as well as substantial communication difficulties with physicians. They also report better health-related behaviors, namely less use of tobacco and alcohol. The use of interpreters did not decrease physician utilization or improve the understanding of physicians by these persons. Overall, our results underscore the fact that deaf and hard-of-hearing persons constitute a minority population that experiences considerable difficulties in the patient-physician relationship.

Adult↗
PubMed1992

Categorical replies to categorical questions by cross-fostered chimpanzees.

The chimpanzees Washoe, Moja, Tatu, and Dar were reared under human cross-fostering conditions that included the use of American Sign Language (ASL) as the medium of two-way communication. In the course of everyday conversation they were asked, in signs, the Wh-questions that are typically asked of young children. In earlier studies, extensive samples showed a pattern of replies, most significantly a developmental sequence, that closely matched the pattern found in the replies of young children. Part 1 of this report is based on a special sample taken when Tatu was 63 months old and Dar was 56 months old, in which experimenters used a large pool of nameable objects, and asked a naming question and at least one descriptive question about the same object in the same context. Tatu and Dar replied to naming questions (WHAT THAT? or WHAT NAME THAT?) with signs that were nouns and to descriptive questions with signs that were modifiers: possessive pronouns for WHOSE THAT?, colors for WHAT COLOR THAT?, and materials for WHAT THAT MAKE FROM? Part 2 is a reanalysis of the Part 1 sample and several other samples of replies, demonstrating that even when their reply was incorrect, these chimpanzees usually replied with a sign from the category specified by the question. The continuities that biologists seek are continuities of laws, patterns of resemblance rather than overlapping data points. Results reported here add depth to the patterns demonstrated in earlier studies.

Animal Communication↗
PubMed1993

Hemispheric specialization for ASL signs and English words: differences between imageable and abstract forms.

American Sign Language (ASL) exhibits properties for which both hemispheres in hearing people show specialized functioning (linguistic vs spatial). To determine the laterality of processing ASL in the normal intact brain, ASL signs and nonsigns were presented to each visual half field of deaf signers for lexical decision. The English glosses for these signs were presented to hearing English speakers along with nonwords. Deaf ASL signers and hearing English speakers both showed a left hemisphere advantage for abstract lexical items. ASL signers showed a significant right hemisphere advantage for imageable signs, whereas English speakers exhibited no visual field effect for imageable words. This difference in brain laterality may reflect differences in the role of imagery in the two languages.

Adult↗
PubMed1982

Signs as pictures and signs as words: effect of language knowledge on memory for new vocabulary.

The role of sensory attributes in a vocabulary learning task was investigated for a non-oral language. Deaf and hearing individuals, more or less skilled in the use of sign language, were asked to learn the English meanings of 22 invented signs which followed the rules of formation for signs in American Sign Language. Each sign stimulus was highly similar in formation to another sign in the set. It was expected that skilled signers would be less affected by this formational similarity because of their greater familiarity with the linguistic structure of sign language. Furthermore, it was suggested that skilled signers would form a visual-linguistic code for the signs while unskilled signers would produce a code from general visual-pictorial processes. These representation differences were expected to lead to qualitatively different error patterns in response to sign similarity. All expectations were confirmed. Skilled signers encoded invented signs in terms of linguistic structure, while unskilled individuals approached the signs as visual-pictorial events. Although both codes are sensory, one reflects linguistic abstraction, and the other does not.

Deafness↗
PubMed1995

Aphasic and parkinsonian signing: differences in phonological disruption.

Since movements of the articulators in sign, unlike in speech, are directly observable, we can investigate signing not only as linguistic behavior but also as motor behavior and directly contrast linguistic-representational and motor-execution disorders of signing. We compared the temporal sequencing characteristics (duration of segments, pausing, periods of change in handshape posture), intactness of distinctive features, and correct use of prosodic templates in three pairs of signers--two Deaf aphasic signers with posterior damage in the left hemisphere, two signers with Parkinson's disease, and two gender- and age-matched control signers. With respect to distinctive features, the aphasic signers exhibited selection errors in the American Sign Language (ASL) distinctive features system, while the Parkinsonian signers showed an intact distinctive feature inventory, but with disturbances in executing these features. The Parkinsonian signers, unlike the aphasic and control signers, showed marked disturbances in the temporal organization and coordination of what we argue are the two subsystems of the ASL sign stream--handshape and movement. The findings demonstrate a phonetic deficit in Parkinsonian signers, in contrast with aphasic signers who showed a disruption in the underlying representation and syllabification processes in the language.

Aged↗
PubMed1996

Competition on the face: affect and language in ASL motherese.

Research on early mother-child interaction has documented the crucial role affect plays in the content and modulation of early interactions. For hearing mothers, voice quality is considered to be the single most informative channel for affective expression. For deaf caregivers who use American Sign Language (ASL), the vocal channel is unavailable, and facial expression is critically important. Not only do facial behaviours signal affective and communicative information, but specific facial behaviours also function as obligatory grammatical markers. This multifunctionality of facial expression presents a dilemma for deaf parents signing to their toddlers as these two systems potentially compete for expression on the face. This study addresses how affective facial expression interacts with the linguistic forms in ASL motherese. To address this issue, we present data from both cross-sectional and longitudinal videotaped interaction from a total of 15 deaf mothers signing with their deaf toddlers (ages 0;9-2;8). Using Ekman & Friesen's Facial Action Coding System (FACS) (1978) we analysed child-directed maternal wh- questions. Because they are frequent in early discourse, and they require furrowed brows which also signal anger and puzzlement, wh- questions represent an ideal context to address the potential conflict of grammatical and affective facial expression in ASL motherese. Our studies indicate a shift from affect to grammar at about the child's second birthday. These findings shed new insight on the nature and possible role of input on the language acquisition process.

Affect↗
PubMed2001

Language and space: some interactions.

Is language linked to mental representations of space? There are several reasons to think that language and space might be separated in our cognitive systems, but they nevertheless interact in important ways. These interactions are evident in language viewed as a means of communication and in language considered a form of representation. In communication, spatial factors may be explicit in language itself, such as the spatial-gestural system of American Sign Language. Even the act of conversing with others is a spatial behavior because we orient to the locations of other participants. Language and spatial representations probably converge at an abstract level of concepts and simple spatial schemas.

Journal Article↗
PubMed1984

An alternating treatments comparison of oral and total communication training with minimally verbal retarded children.

This study was a comparison of the effects of oral speech with total communication (speech plus sign language) training on the ability of mentally retarded children to repeat 4-word sentences. Three children were chosen who used single words to communicate but who did not combine words into complete sentences. Three sentence pairs were trained, with each pair having one sentence trained using oral methods and an equivalent one trained using the total communication approach. Both training procedures involved chaining sentence parts, reinforcement, and prompting. Oral methods involved presenting vocal stimuli and requiring vocal responses whereas total communication methods involved presenting vocal and signed stimuli and requiring vocal and signed responses. For the initial sentence pair with each child, an alternating treatments design was used to determine the relative efficacy of the two language training approaches. This was repeated with a second and third sentence pair using a multiprobe technique within a multiple baseline design. Results pointed to the superiority of the total communication approach in facilitating sentence repetition. Possible explanations of these results are offered and the utility of the alternating treatments experimental design is discussed.

Child↗
PubMed1993

Linguistic characteristics of neurotic, borderline and psychotic personality organization.

Thirty patients were subjected to a Structural Interview by means of which 10 of them received the diagnosis NPO (Neurotic Personality Organization), 10 BPO (Borderline Personality Organization) and 10 PPO (Psychotic Personality Organization). About 2500 words and groups of words were extracted from the patients' utterances for analysis. The word-frequencies thus found were analyzed by a PLS discriminant analysis which yielded two significant principal components (main dimensions) explaining 57% of the variance. This analysis showed that the three groups of patients are well separated from one another and that there is a definite correlation between personality organization and linguistic variables. The main features of the BPO-patients in this study seem to be that they refer to positions outside themselves and their language is impersonal; we see this as an example of a vacillating identity. The NPO-group is characterized by an intense and rich language, signs of a more advanced symbolizing ability, deixis and high level defenses. The language of the PPO-patients is poor and its predominant feature is a lack of words; in our interpretation this indicates foreclosure and a lack of identity.

Adult↗
PubMed1989

Adult follow-up of the acquired aphasia-epilepsy syndrome in childhood. Report of 7 cases.

The authors report at adult age 7 patients (6 men, one woman) with the syndrome of "acquired aphasia-epilepsy", 6 of which had been previously studied as children. The results of the language, neuropsychological and socio-educational evaluation detailed many years after the onset of the aphasia are the subject of this report. One man has recovered completely, one has a normal oral language but is severely dyslexic, one has recovered normal comprehension but has severe expressive language problems. Four have absent language comprehension and lack of expressive speech, and only one of them has learned and is using sign language with some efficiency. None has developed functional written language. Attempts to offer a substitutive language to children with prolonged inability to understand and use oral language appears important but is fraught with problems. Although there are no conclusive data about the role of the continuous paroxysmal EEG discharges and the effect of their suppression with drug treatment on the prognosis of the aphasia, the definite fluctuations of the aphasia in some cases, the isolated recent case reports of definitive improvement with drug treatment justify further trials in this potentially severe and chronic condition.

Adolescent↗
PubMed2001

PET evaluation of bilingual language compensation following early childhood brain damage.

We report a positron emission tomography (PET) study in a 37-year-old, right handed, bilingual (English and American Sign Language) male with left frontal lobe damage, without evidence of language or general intellectual dysfunction. A brain MRI scan demonstrated an atrophic lesion of the left dorsolateral prefrontal, orbital, and opercular cortices extending from the frontal pole to precentral gyrus and including parts of anterior cingulate cortex, due to an probable infantile encephalitis. H(2) (15)O PET scans found evidence of increased right hemisphere activity compared to normal controls during spontaneous generation of narrative in both English and ASL. Neuropsychological data were within normal limits with the exception of visuospatial function. The results suggest the possibility that plasticity, unmasking of neural pathways, and or other adaptations of language function in the right hemisphere may have occurred, and are discussed with regard to the crowding hypothesis.

Adult↗
PubMed1983

Late language development in a child unable to recognize or produce speech sounds.

A boy with severe quadriplegia who neither recognized nor uttered speech sounds acquired language. Until the age of 6 years he was considered to be of severely subnormal intelligence. At age 6 years 9 months he was introduced to a manual sign system. Subsequently he was able to read, write, converse, and produce imaginative stories. Attention and memory were unimpaired and affective and social responsiveness developed appropriately. The case history demonstrates the selective effects of brain lesions that, despite extensive damage, may spare functional systems necessary for cognitive and linguistic development. It highlights the difficulty in diagnosing and evaluating the intellectual and affective potential of a multihandicapped child without functional hearing or speech and emphasizes the importance of sign language as a communication channel and prerequisite for the acquisition of reading and writing skills.

Aphasia↗
PubMedDate not supplied

Late diagnosis of congenital hearing impairment in children: the parents' experiences and opinions.

The purpose of the present investigation is to describe how parents experience a delayed identification of their child's hearing impairment. Ten parents of 8 children were interviewed. The impairment was confirmed when the children were between 2 years, and 5 years and 8 months. The results show that the parents and their child pass through a series of distinct phases: Unawareness, Suspicion, Confirmation and Habilitation. After the birth of the child there was first a calm period, which lasted until the possibility of a hearing impairment was suspected. Once the suspicion was raised, a time of much anxiety and frustration ensued. The parents described how defective communication and misunderstanding lead to frequent conflicts with their child. The differing behaviour of the child, in combination with poor language development, initiated referral to audiological assessment and confirmation of the hearing impairment. After confirmation, the parents felt relief but at the same time a sorrow. When hearing aids had been fitted and education in sign language was under way, the child's language and social behaviour improved. Supposedly, the late detection is explained by the combination of an insufficient test method that cannot detect all children with a hearing impairment and, in cases of uncertainty, a tendency to let the child pass rather than "bringing bad news". All parents in the present study would have wished to participate in a hearing screening program for new-borns, had the opportunity been present.

Adult↗