Accessibility is important in the development of digital products as well as in physical products. An accessible product enables all people to use it, whether they have a disability or not. This thesis focuses on accessibility for visually impaired people in a music streaming service on desktop. Many music streaming services for desktop are built with web technologies, including Spotify. The aim of this thesis was to evaluate the accessibility status of the Spo- tify desktop application as well as develop accessibility guidelines fo- cused on a music streaming service. A user test was performed to in- vestigate the accessibility status of the desktop application. Existing accessibility guidelines was studied and used together with the results of the user test to develop accessibility guidelines applicable to a music streaming service. It was found that the Spotify desktop application had many accessibility issues and these were considered when developing accessibility guide- lines. The existing guidelines studied was the WCAG 2.0 guidelines developed by W3C. These were read through completely and compiled in Chapter 4 of this report. The result of the thesis was accessibility guidelines suitable for a music streaming service on desktop. Since music streaming applications can be developed using different techniques and frameworks these guide- lines should be used as a guide on how to implement accessibility and needs to be customized for each use case. Though the fundamentals of the guidelines should be applicable to most music streaming desktop applications.

This dissertation presents work towards the development of a multiple finger, worn, dynamic display device, which utilizes a method of texture encoded information to haptically render graphical images for individuals who are blind or visually impaired. The device interacts directly with the computer screen, using the colors and patterns displayed by the image as a means to encode complex patterns of vibrotactile output, generating the texture feedback to render the image. In turn, the texture feedback was methodically designed to enable parallel processing of certain coarse information, speeding up the exploration of the diagram and improving user performance. The design choices were validated when individuals who are blind or visually impaired, using the multi-fingered display system, performed three-times better using textured image representations versus outline representations. Furthermore, in an open-ended object identification task, the display device saw on average two-times better performance accuracy than that previously observed for raised-line diagrams, the current standard for tactile diagrams.

Researchers have learned much about how sighted individuals seek information on Web sites - for example, users follow "information scent" as they move from page to page, and individual differences may impact successful information seeking on the Web. While it is possible that individuals with disabilities, especially those with severe visual impairments, perform information-seeking activities in a similar manner, little is known about how individuals who use screen readers to navigate actually seek information on the Web. In this study, we used both qualitative and quantitative measures to investigate the Web navigation techniques of four screen-reader users and how a user’s experience affects these navigation techniques and his or her ability to successfully complete an information-finding task. We compared metrics for between-page and within-page navigation to studies of sighted users. We also considered how a Web site’s compliance with Section 508 guidelines affects the overall information-finding experience of a visually-impaired individual. We discovered that among the four individuals in this study, user experience was not necessarily indicative of a successful information-finding experience. As individuals, the participants' navigation techniques varied widely; as a group, they generally searched more frequently and used the back button less frequently than has been reported for sighted individuals. Screen-reader users in this study followed a more flimsy, linear navigation style and generally used scrolling actions rather than searching actions. When using a Web site that has a Section 508 compliant home page, we found that the screen-reader users in this study completed information-finding tasks significantly more quickly, used significantly fewer actions, and reported a more satisfying information-finding experience. They were also more successful at finding the information goal and encountered fewer impasses. Using both quantitative and qualitative measures was critical in this study. The quantitative metrics allowed us to compare values and the qualitative data provided additional insight into individual differences as well as allowing a deeper understanding of the quantitative data. The information from this study contributes to the growing body of research knowledge about screen-reader users. It also contributes a new understanding of screen-reader users that can be used by the worldwide community of Web developers, designers, and users. / text

Diss. (sammanfattning) Stockholm : Karol. inst. / Härtill 5 uppsatser.

Thesis (M.S.)--University of Alabama at Birmingham, 2007. / Title from first page of PDF file (viewed June 23, 2008). Includes bibliographical references (p. 65-73).

abstract: Improving accessibility to public buildings by people with special needs has been an important societal commitment that is mandated by federal laws. In the information age, accessibility can mean more than simply providing physical accommodations like ramps for wheel-chairs. Better yet, accessibility will be fundamentally improved, if a user can be made aware of important location-specific information like functions of offices near the user within a building. A smart environment may help a new person quickly get acquainted about the environment. Such features can be more critical for cases of making an indoor environment more accessible to people with visual impairment. With the intention to promote the integration of visually impaired people in society, this thesis efforts on methodologies for building smart and accessible indoor office environments with the help of Apple's Bluetooth Low Energy (BLE) technology called iBeacon to provide location awareness and enable easy access to information about the environment to people with visual impairment. This thesis presents work done on developing an iterative based approach in improving the configuration of given number of iBeacons to gain optimal signal coverage in a given office space environment and enabling smart features such as tagging points of interest and push notifications. This work aims to exploit the idea to look at visual impairment beyond the level of disability and cash it at as an opportunity to bring about a change of style of living. This work develops a methodology by introducing an end-to-end systems that uses intelligent server side and visually-impaired-friendly client side interfaces to give a prototype of an assistive technology to help them do basic activities like getting familiarized about an office environment without the need for asking for assistance. / Dissertation/Thesis / Masters Thesis Computer Science 2017

CoordenaÃÃo de AperfeiÃoamento de NÃvel Superior / Promover saÃde à tambÃm capacitar cidadÃos para atuarem sobre determinantes da prÃpria saÃde, inclusive pessoas com deficiÃncia. Assim, materiais educativos em saÃde acessÃveis aos cegos passÃveis de ser veiculados na rede web poderÃo ampliar sua independÃncia e autonomia e sÃo denominados tecnologia assistiva. Nesta pesquisa, trabalhou-se com a tecnologia âAmamentaÃÃo em aÃÃoâ. Esta à uma literatura de cordel e como tal apresenta caracterÃstica peculiar que exibe como estratÃgia lÃdica, a rima. Os folhetos foram selecionados por tal atributo e a amamentaÃÃo por ser conteÃdo importante e seus Ãndices estarem aquÃm do recomendado pelos ÃrgÃos competentes. Este tema à vivenciado por muitas mulheres e representa momento de amor entre mÃe e filho. AlÃm disso, apresenta menor risco de desenvolver doenÃas Ãs crianÃas amamentadas. Objetivou-se validar tecnologia assistiva sobre amamentaÃÃo para cegos na modalidade literatura de cordel em Ãudio atravÃs do acesso online para promoÃÃo da saÃde. Trata-se de pesquisa do tipo desenvolvimento metodolÃgico utilizando modelo da psicometria. A pesquisa foi desenvolvida no LaboratÃrio de ComunicaÃÃo em SaÃde da Universidade Federal do CearÃ. A amostra foi constituÃda de 124 sujeitos com idade mÃnima de 18 anos e domÃnio bÃsico de uso do software disponÃvel. Para coleta dos dados, utilizou-se pÃgina da web. Na mesma estavam a tecnologia e formulÃrios para preenchimento. Para anÃlise dos dados, calcularam-se mÃdias e desvio padrÃo das variÃveis quantitativas. As variÃveis qualitativas foram analisadas pelos testes Qui-Quadrado e razÃo de verossimilhanÃa. A comparaÃÃo das mÃdias dos tÃpicos foi realizada com o teste t de Student para dados independentes ou pelo teste F de Snedecor (ANOVA). Consideraram-se significantes as anÃlises quando p < 0,05. O projeto foi aprovado pelo Comità de Ãtica em Pesquisa da Universidade Federal do CearÃ. A maioria dos sujeitos tinha idade de 30-49 anos (61,3%), sexo feminino (51,6%), cursaram o ensino mÃdio (48,4%), nÃo casados (55,6%), com renda de atà um salÃrio mÃnimo (2012 - R$ 622,00 / 2013 - R$673,00) (40,3%), que trabalham (75,0%), residem no Nordeste (90,3%), aposentados (21,8%) e com cegueira de nascenÃa (51,6%). Em relaÃÃo à avaliaÃÃo da tecnologia assistiva, pelas mÃdias encontradas, todos os tÃpicos foram favorÃveis, objetivo (93,6  10,7), organizaÃÃo (87,0  14,5), estilo de Ãudio (86,7  15,6) e motivaÃÃo (88,9  15,3), e a mesma foi considerada estratÃgia vÃlida de promoÃÃo da saÃde. ApÃs avaliaÃÃo da tecnologia, foi perceptÃvel que a mesma atingiu aos objetivos propostos e metas pretendidas, com boa organizaÃÃo geral, estrutura, estratÃgia de apresentaÃÃo e coerÃncia, alÃm de apropriada compreensÃo e bom estilo de Ãudio, com capacidade de causar impacto, motivaÃÃo e/ou interesse. Como profissional responsÃvel pela promoÃÃo da saÃde, o enfermeiro deve se envolver cada vez mais no ambiente real dos sujeitos para diagnÃstico situacional e consequente intervenÃÃo eficaz. / Health promotion also means enabling citizens to act on the determinants of their own health, including disabled people. Hence, health education material accessible to the blind which can be disseminated through the web can enhance their independence and autonomy and are called assistive technology. In this research, the technology âBreastfeeding in actionâ was used. This technology is cordel literature and, as such, is characterized by the rhyme as a playful strategy. The booklets were selected because of this attribute and breastfeeding because the content is important and because its levels are inferior to the recommendations by competent entities. This theme is experienced by many women and represents a moment of love between mother and child. In addition, breastfed children present less risk of developing illnesses. The aim was to validate assistive technology on breastfeeding in the cordel literature modality in audio through online access for health promotion. A methodological development research was undertaken, using the psychometric model. The research was developed at the Health Communication Laboratory of the Universidade Federal do CearÃ. The sample consisted of 124 subjects with a minimum age of 18 years and basic mastery to use the available software. To collect the data, a website was used. The page showed the technology and forms for completion. To analyze the data, means and standard deviations were calculated for the quantitative variables. The qualitative variables were analyzed using the chi-square and likelihood ratio tests. Studentâs t-test for independent data or Snedecorâs F-test (ANOVA) were used to compare the means of the topics. Analyses were considered significant when p < 0.05. Approval for the project was obtained from the Research Ethics Committee at Universidade Federal do CearÃ. Most subjects were 30-49 years of age (61.3%), female (51.6%), had taken secondary education (48.4%), were not married (55.6%), with an income of up to one minimum wage (2012 - R$ 622.00 / 2013 - R$673.00) (40.3%), who work (75.0%), live in the Northeast (90.3%), are retired (21.8%) and have been blind since birth (51.6%). As regards the assessment of the assistive technology, according to the means found, all topics were favorable, objective (93.6  10.7), organization (87.0  14.5), audio style (86.7  15.6) and motivation (88.9  15.3), and the technology was considered a valid health promotion strategy. The assessment of the technology revealed that it achieved the proposed objectives and intended goals, with a good general organization, structure, presentation strategy and coherence, besides appropriate understanding and a good audio style, able to cause impact, motivation and/or interest. As professionals responsible for health promotion, nurses should increasingly engage in the subjectsâ real environment for the sake of a situational diagnosis and consequent effective intervention.

CoordenaÃÃo de AperfeiÃoamento de NÃvel Superior / Promover saÃde à tambÃm capacitar cidadÃos para atuarem sobre determinantes da prÃpria saÃde, inclusive pessoas com deficiÃncia. Assim, materiais educativos em saÃde acessÃveis aos cegos passÃveis de ser veiculados na rede web poderÃo ampliar sua independÃncia e autonomia e sÃo denominados tecnologia assistiva. Nesta pesquisa, trabalhou-se com a tecnologia âAmamentaÃÃo em aÃÃoâ. Esta à uma literatura de cordel e como tal apresenta caracterÃstica peculiar que exibe como estratÃgia lÃdica, a rima. Os folhetos foram selecionados por tal atributo e a amamentaÃÃo por ser conteÃdo importante e seus Ãndices estarem aquÃm do recomendado pelos ÃrgÃos competentes. Este tema à vivenciado por muitas mulheres e representa momento de amor entre mÃe e filho. AlÃm disso, apresenta menor risco de desenvolver doenÃas Ãs crianÃas amamentadas. Objetivou-se validar tecnologia assistiva sobre amamentaÃÃo para cegos na modalidade literatura de cordel em Ãudio atravÃs do acesso online para promoÃÃo da saÃde. Trata-se de pesquisa do tipo desenvolvimento metodolÃgico utilizando modelo da psicometria. A pesquisa foi desenvolvida no LaboratÃrio de ComunicaÃÃo em SaÃde da Universidade Federal do CearÃ. A amostra foi constituÃda de 124 sujeitos com idade mÃnima de 18 anos e domÃnio bÃsico de uso do software disponÃvel. Para coleta dos dados, utilizou-se pÃgina da web. Na mesma estavam a tecnologia e formulÃrios para preenchimento. Para anÃlise dos dados, calcularam-se mÃdias e desvio padrÃo das variÃveis quantitativas. As variÃveis qualitativas foram analisadas pelos testes Qui-Quadrado e razÃo de verossimilhanÃa. A comparaÃÃo das mÃdias dos tÃpicos foi realizada com o teste t de Student para dados independentes ou pelo teste F de Snedecor (ANOVA). Consideraram-se significantes as anÃlises quando p < 0,05. O projeto foi aprovado pelo Comità de Ãtica em Pesquisa da Universidade Federal do CearÃ. A maioria dos sujeitos tinha idade de 30-49 anos (61,3%), sexo feminino (51,6%), cursaram o ensino mÃdio (48,4%), nÃo casados (55,6%), com renda de atà um salÃrio mÃnimo (2012 - R$ 622,00 / 2013 - R$673,00) (40,3%), que trabalham (75,0%), residem no Nordeste (90,3%), aposentados (21,8%) e com cegueira de nascenÃa (51,6%). Em relaÃÃo à avaliaÃÃo da tecnologia assistiva, pelas mÃdias encontradas, todos os tÃpicos foram favorÃveis, objetivo (93,6  10,7), organizaÃÃo (87,0  14,5), estilo de Ãudio (86,7  15,6) e motivaÃÃo (88,9  15,3), e a mesma foi considerada estratÃgia vÃlida de promoÃÃo da saÃde. ApÃs avaliaÃÃo da tecnologia, foi perceptÃvel que a mesma atingiu aos objetivos propostos e metas pretendidas, com boa organizaÃÃo geral, estrutura, estratÃgia de apresentaÃÃo e coerÃncia, alÃm de apropriada compreensÃo e bom estilo de Ãudio, com capacidade de causar impacto, motivaÃÃo e/ou interesse. Como profissional responsÃvel pela promoÃÃo da saÃde, o enfermeiro deve se envolver cada vez mais no ambiente real dos sujeitos para diagnÃstico situacional e consequente intervenÃÃo eficaz. / Health promotion also means enabling citizens to act on the determinants of their own health, including disabled people. Hence, health education material accessible to the blind which can be disseminated through the web can enhance their independence and autonomy and are called assistive technology. In this research, the technology âBreastfeeding in actionâ was used. This technology is cordel literature and, as such, is characterized by the rhyme as a playful strategy. The booklets were selected because of this attribute and breastfeeding because the content is important and because its levels are inferior to the recommendations by competent entities. This theme is experienced by many women and represents a moment of love between mother and child. In addition, breastfed children present less risk of developing illnesses. The aim was to validate assistive technology on breastfeeding in the cordel literature modality in audio through online access for health promotion. A methodological development research was undertaken, using the psychometric model. The research was developed at the Health Communication Laboratory of the Universidade Federal do CearÃ. The sample consisted of 124 subjects with a minimum age of 18 years and basic mastery to use the available software. To collect the data, a website was used. The page showed the technology and forms for completion. To analyze the data, means and standard deviations were calculated for the quantitative variables. The qualitative variables were analyzed using the chi-square and likelihood ratio tests. Studentâs t-test for independent data or Snedecorâs F-test (ANOVA) were used to compare the means of the topics. Analyses were considered significant when p < 0.05. Approval for the project was obtained from the Research Ethics Committee at Universidade Federal do CearÃ. Most subjects were 30-49 years of age (61.3%), female (51.6%), had taken secondary education (48.4%), were not married (55.6%), with an income of up to one minimum wage (2012 - R$ 622.00 / 2013 - R$673.00) (40.3%), who work (75.0%), live in the Northeast (90.3%), are retired (21.8%) and have been blind since birth (51.6%). As regards the assessment of the assistive technology, according to the means found, all topics were favorable, objective (93.6  10.7), organization (87.0  14.5), audio style (86.7  15.6) and motivation (88.9  15.3), and the technology was considered a valid health promotion strategy. The assessment of the technology revealed that it achieved the proposed objectives and intended goals, with a good general organization, structure, presentation strategy and coherence, besides appropriate understanding and a good audio style, able to cause impact, motivation and/or interest. As professionals responsible for health promotion, nurses should increasingly engage in the subjectsâ real environment for the sake of a situational diagnosis and consequent effective intervention.

FundaÃÃo Cearense de Apoio ao Desenvolvimento Cientifico e TecnolÃgico / Due to altered visual function, blind people are more exposed to risk factors of hypertension, a situation that proves the need to promote educational actions to prevent this disease. The objective was to develop affordable online course for the blind ones on prevention of hypertension. It was used Development Model of Digital Educational Material composed by five phases entitled Analysis and Planning; modeling; implementation; Evaluation and Maintenance; Distribution. In Analysis and Planning phase the product was characterized. The course about hypertension in online mode was directed to blind population. It was built in modeling a script and it was added a content to multimedia elements, being transformed into the pages for internet format with definition of navigation tools and design. There was obtained 15 pages that were divided into six educational modules. The study followed the accessibility standards of national documents (e-MAG) and international (WCAG). In the Deployment it was submit the accessibility evaluating course pages. Initially we used the software ASES that generated Error Reporting, accusing infringement of four national recommendations and three international principles. The pages were reviewed, and the inconsistencies were corrected. In the second test, the pages were lodged into SOLAR environment. It was contacted four blind people whom rated platform accessibility and usability of the platform by performing sequential activities of navigation. It was found that the SOLAR is partially accessible as it found some accessibility barriers (lack of field identification, disposal and inadequate identification fields and links; elements that prevented reading the content in a logical sequence and using the mouse). Therefore, the SOLAR needs improvement to facilitate navigation by the blind. The course components such as texts; images; audio and links were considered accessible, and the initial difficulty in navigation was, to be hosted, on the platform that needed improvements. The Evaluation and Maintenance occurred throughout the course preparation and the distribution will be addressed in further studies. The course did not suffer any changes and the prototype implemented in SOLAR was taken as the result of the research. It concludes that build online course as assistive technology for the blind is a viable task. This study provides information about prevention of hypertension and equal access to digital educational materials. The study encourages nurses to develop affordable technologies for health promotion of blind people. / Devido alteraÃÃo da funÃÃo visual, cegos estÃo mais expostos aos fatores de risco da hipertensÃo, situaÃÃo que comprova a necessidade de promover aÃÃes educativas para prevenir esta patologia. Objetivou-se desenvolver curso online acessÃvel para cegos sobre prevenÃÃo da hipertensÃo. Utilizou-se Modelo de Desenvolvimento de Material Educativo Digital composto por cinco fases intituladas AnÃlise e Planejamento; Modelagem; ImplementaÃÃo; AvaliaÃÃo e ManutenÃÃo; DistribuiÃÃo. Na fase AnÃlise e Planejamento o produto foi caracterizado. Direcionou-se o curso aos cegos com tema sobre hipertensÃo na modalidade online. Na Modelagem construiu-se conteÃdo em roteiro e agregou-se elementos de multimÃdia, sendo transformado em pÃginas no formato para internet com definiÃÃo das ferramentas de navegaÃÃo e design. Obteve-se 15 pÃginas divididas em seis mÃdulos didÃticos. Seguiu-se os padrÃes de acessibilidade dos documentos nacionais (e-MAG) e internacionais (WCAG). Na ImplementaÃÃo submeteu-se as pÃginas do curso a avaliaÃÃo de acessibilidade. Inicialmente utilizou-se software ASES que gerou RelatÃrio de Erros, acusando infraÃÃo de quatro recomendaÃÃes nacionais e trÃs princÃpios internacionais. As pÃginas foram revisadas, sendo corrigidas as inconsistÃncias. No segundo teste, hospedou-se as pÃginas no ambiente SOLAR. Contactou-se quatro pessoas cegas que avaliaram acessibilidade e usabilidade da plataforma e curso mediante realizaÃÃo de atividades sequenciais de navegaÃÃo. Verificou-se que o SOLAR à parcialmente acessÃvel, pois foram encontradas algumas barreiras de acessibilidade (ausÃncia de identificaÃÃo de campos; disposiÃÃo e identificaÃÃo inadequada de campos e links; elementos que impediam leitura do conteÃdo em sequÃncia lÃgica e uso do mouse). Logo, o SOLAR necessita de melhorias para facilitar a navegaÃÃo por cegos. Os componentes do curso, tais como textos; imagens; Ãudio e links foram considerados acessÃveis, sendo que a dificuldade inicial na navegaÃÃo ocorreu por estar hospedado na plataforma que necessita de aprimoramentos. A AvaliaÃÃo e ManutenÃÃo ocorreu durante toda elaboraÃÃo do curso e a DistribuiÃÃo serà contemplada em estudo posterior. O curso nÃo sofreu modificaÃÃes e o protÃtipo implementado no SOLAR foi considerado resultado final da pesquisa. Conclui-se que construir curso online como tecnologia assistiva para cegos à tarefa viÃvel. Este oferece conhecimento sobre prevenÃÃo da hipertensÃo e igualdade de acesso a materiais educativos digitais. O estudo estimula enfermeiros a desenvolver tecnologias acessÃveis para promoÃÃo da saÃde das pessoas cegas.

Orientador: Cecilia Guarnieri Batista / Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Ciencias Medicas / Made available in DSpace on 2018-08-11T04:21:59Z (GMT). No. of bitstreams: 1 Silva_MichelliAlessandra_M.pdf: 1204457 bytes, checksum: 5ecf2252ed7d0f1048a644332032001d (MD5) Previous issue date: 2008 / Resumo: A literatura aponta para o fato de que crianças com deficiência visual, com outras deficiências associadas, estão em risco de desenvolvimento. Tendo isso em vista, pretendeu-se, no presente estudo, observar a interação de crianças com esse perfil, no contexto de grupos de convivência, com o intuito de identificar indícios de desenvolvimento e processos de apropriação de práticas sociais. Considerando-se que, na perspectiva histórico-cultural, a dimensão semiótica das atividades e interações humanas é central na constituição do sujeito, buscou-se olhar para as produções das crianças e os processos de significação sobre essas produções nas dinâmicas interativas como lugares possíveis para se compreender o desenvolvimento de crianças com deficiências. Para tanto, tomou-se como um dos focos de análise os diferentes usos de objetos, a participação em atividades e a linguagem das crianças em estudo, como lugares para se observar esses processos. Do ponto de vista metodológico, o tipo de estudo proposto para a realização desta pesquisa foi o estudo de caso, a partir do qual foi realizada uma análise microgenética, recortando o material documentado em episódios que fossem significativos para o propósito do estudo. Por se tratar de uma proposta de pesquisa qualitativa, isto é, uma pesquisa que visa descrever o fenômeno, tentando entender sua totalidade complexa e dinâmica, foram estudadas três crianças, entre 4 e 10 anos. Os sujeitos da pesquisa faziam parte de um programa integrado de pesquisa e intervenção em um centro universitário, voltado para crianças com deficiência visual. Três crianças foram selecionadas nos grupos, por serem as que apresentavam as alterações mais acentuadas no desenvolvimento (quadros neurológicos e/ou sindrômicos, alterações no desenvolvimento cognitivo, lingüístico e social). As sessões semanais foram filmadas e transcritas e os dados analisados levaram em conta as práticas sociais e a dinâmica de interação entre os sujeitos (adultos e crianças). Através das análises foi possível identificar processos de apropriação de práticas sociais (por exemplo: uso da torneira), diferentes usos de objetos (exemplo: uso de cola ¿gliter¿), diferentes níveis de participação em atividades (por exemplo: brincadeira de roda), bem como diferentes usos da linguagem (por exemplo: nomeação e descrição de objetos) por parte das crianças. As análises também permitiram que fossem observados diferentes modos de atuação dos adultos que organizavam a situação, propunham atividades, atribuíam significados e davam sentido às ações da criança. Considerou-se que a observação por meio de análise microgenética conferiu visibilidade a diferentes instâncias de apropriação de práticas sociais e permitiu identificar, nas formas de atuação dos adultos, aspectos que contribuíram para isso. Discutiu-se o fato de que o problema, com essas crianças, estava mais relacionado a dificuldades na estabilização de processos de desenvolvimento, do que a 'atrasos¿, linearmente qualificados. A análise evidenciou a importância dos processos de interação e significação, por parte dos adultos e dos parceiros no grupo, na constituição dos sujeitos. Foram apresentadas, finalmente, sugestões para a promoção do desenvolvimento de crianças com esse perfil, centradas nos processos de interação e significação / Abstract: Studies on the development of children with visual impairment, associated with other deficiencies, indicate risks on their development. In the present study, it was observed the interaction of children with this profile, in the context of educational groups, and it was described processes of appropriation of social practices. Taking into account that, in the historical-cultural perspective, the semiotic dimension of the activities and human interactions is central in the constitution of subject, the children actions and the signification processes in the interior of interactional dynamic were seen as possible places to understand the development of those children. One of the focuses of analysis was the different uses of objects, the participation in activities and the language of the children. On the methodological point of view, three case studies were presented. It was done a microgenetic analysis, clipping the material collected in episodes significatives for the purpose of the study. The children, aged between 4 and 10 years, participated of an intervention and research program at a university center, for children with visual impairment. Three children with severe developmental alterations (neurological or syndromic problems, alteration in linguistics, social and cognitive development) were selected from the groups. The weekly sessions were filmed and transcribed, and the data were analyzed regarding the social practices and the interactional dynamic between the subjects (adults and children). From the analysis it was possible to identify processes of social practices appropriation (exemple: the use of a ta), different uses of objects (exemple: the use of a glue), different levels of participation in activities (exemple: nursery rhymes) and different uses of language (exemple: nomination of objects) by children. It was also observed different modes of adults¿ intervention: who organized the situation, proposed activities and gave significance to the children¿s actions. The observation from microgenetic analysis gave visibility to different instances of social practices appropriation and aspects on the adults¿ intervention that contributed for it. It was discussed the fact that the problem with those children is more related to the difficulties on the stabilization of developmental processes than to ¿delays¿, linearly qualified. The analysis evidenced the importance of the interaction and signification processes in the constitution of subjects. There were presented suggestions to promote the development of children with this profile, centered in the interaction and signification processes / Mestrado / Saude da Criança e do Adolescente / Mestre em Saude da Criança e do Adolescente