Browsing by Subject "Deafness"

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    Open Access
    A group test of intelligence for the deaf
    (1952) Du Toit, Jozua Malherbe; Van Rensburg, J A J
    A short survey of previous attempts at providing intelligence tests suitable for the deaf is made, and the most important of these tests are critically examined. It is shown that the few existing group tests for the deaf are quite inadequate and unsatisfactory, a fact which might possibly account for the discrepancy in the findings of different investigators, and in the results of different tests. The need for a better group test of intelligence for the deaf is emphasized and stated as the aim of the present investigation. For such a test to be satisfactory it would have to comply with certain principles, based on a priori considerations and on actual experience and acquaintance with the deaf. These conditions are briefly as follows: The test should presuppose as little acquired knowledge (such as language in any form) as possible; it should be possible to give the necessary instructions by pantomime only; it should fall within the proper range of difficulty; no speed tests should be included; abundant practice material should be provided; subtests should consist of many items; the material should capture and retain the interest of deaf children. Fifteen tests brought together for the purpose of a preliminary selection, are briefly described. The results of the application of these tests to a group of deaf pupils are considered, the merits of the different tests in practice are discussed and the reasons for discarding some of them are given. The ten tests retained were applied to a random sample of twenty percent of all normal children of ages ten, eleven and twelve years in eight schools, together with a criterion test.
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    A rapid method for detection of five known mutations associated with aminoglycoside-induced deafness
    (BioMed Central Ltd, 2009) Bardien, Soraya; Human, Hannique; Harris, Tashneem; Hefke, Gwynneth; Veikondis, Rene; Schaaf, H Simon; van der Merwe, Lize; Greinwald, John; Fagan, Johan; de Jong, Greetje
    BACKGROUND:South Africa has one of the highest incidences of multidrug-resistant tuberculosis (MDR-TB) in the world. Concomitantly, aminoglycosides are commonly used in this country as a treatment against MDR-TB. To date, at least five mutations are known to confer susceptibility to aminoglycoside-induced hearing loss. The aim of the present study was to develop a rapid screening method to determine whether these mutations are present in the South African population. METHODS: A multiplex method using the SNaPshot technique was used to screen for five mutations in the MT-RNR1 gene: A1555G, C1494T, T1095C, 961delT+C(n) and A827G. A total of 204 South African control samples, comprising 98 Mixed ancestry and 106 Black individuals were screened for the presence of the five mutations. RESULTS: A robust, cost-effective method was developed that detected the presence of all five sequence variants simultaneously. In this pilot study, the A1555G mutation was identified at a frequency of 0.9% in the Black control samples. The 961delT+C(n) variant was present in 6.6% of the Black controls and 2% of the Mixed ancestry controls. The T1095C, C1494T and A827G variants were not identified in any of the study participants. CONCLUSION: The frequency of 0.9% for the A1555G mutation in the Black population in South Africa is of concern given the high incidence of MDR-TB in this particular ethnic group. Future larger studies are warranted to determine the true frequencies of the aminoglycoside deafness mutations in the general South African population. The high frequencies of the 961delT+C(n) variant observed in the controls suggest that this change is a common non-pathogenic polymorphism. This genetic method facilitates the identification of individuals at high risk of developing hearing loss prior to the start of aminoglycoside therapy. This is important in a low-resource country like South Africa where, despite their adverse side-effects, aminoglycosides will continue to be used routinely and are accompanied with very limited or no audiological monitoring.
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    Voices through my hands: An auto-ethnographic study of the lived experiences of a South African child of Deaf adults
    (2018) Harrison, Jane; Watermeyer, Brian
    There is a dearth of literature about the lived experiences of hearing children of Deaf adults (CODAs) within the South African context that this study attempts to address. Most African publications examining issues of Deafness focus on the experience of Deaf people themselves. Not much attention is given to the fact that children of Deaf adults may have their own experiences which are tied to the Deafness of their parents. Through a critical examination of my own experiences as a CODA, I sought to answer the following question: In which ways has my position in my family as a CODA, my identification as a Coloured person, my gender, and the context of Apartheid South Africa influenced my sense of self? Aim: The aim of the study is to provide the reader with rich, first-person information regarding the social, political and cultural circumstances of my formative years, in the context of being female, coloured, and having parents who are Deaf, against the backdrop of the South Africa of the 1980s. I draw attention to the intersections within my life as a bicultural, Coloured female in South Africa. Using a qualitative research method, auto-ethnography (specifically an evocative ethnographic method) to generate and analyse data, I endeavour to connect my story to wider cultural, political and social processes. The analysis was informed by literature from d/Deaf studies and a conceptual framework that included models of disability, the notion of intersectionality, and theoretical ideas concerning identity formation. Objectives: I explore: i) the key elements of context that combined to shape my experience of being raised as a CODA; ii) my experiences of identity formation; iii) the ways in which the intersection of various social life attributes that include race, gender, bicultural identity, and disability have intersected to frame my lifeworld as a CODA. Methodology: I used the auto-ethnographic approach and specifically, evocative autoethnography. I drew upon the thematic analysis method to analyse the data. Findings: The auto-ethnographic material depicts my lived experience as a CODA. A key finding relates to bicultural identity formation in a context of South Africa that has been profoundly shaped by Apartheid. While negotiating a terrain that is characterised by rampant racial discrimination and the difficulties that surround an identity that is both of the Deaf and hearing worlds, my story shows up a number of active responses to my life-world, rather than a passive acceptance and internalisation of its contradictions. Conclusion: This study supports the use of auto-ethnography as a way of exploring the experience of identity formation in CODAs in a context where the ambiguities of life as a CODA are complicated by identity intersections with race, gender and culture.