Mobile text-entry models for people with disabilities

Guerreiro, Tiago; Lagoá, Paulo; Nicolau, Hugo; Santana, Pedro C.; Jorge, Joaquim

doi:10.1145/1473018.1473067

Cited by 11 publications

(12 citation statements)

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“…Although these other multimodal input methods may be accessible alternatives, they also have significant usability issues. These include the small keys on portable keyboards, difficulty using text-to-speech feedback, or dictation in noisy environments; in addition, Braille keyboards are perceived as expensive or cumbersome to carry [6,15]. We firmly believe that visually impaired people should have the same opportunity to choose gestural or alternative input modalities as sighted users do.…”

Section: Introductionmentioning

confidence: 99%

Analyzing visually impaired people’s touch gestures on smartphones

Buzzi

Leporini

Trujillo

2016

Multimed Tools Appl

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We present an analysis of how visually impaired people perform gestures on touch-screen smartphones and report their preferences, explaining the procedure and technical implementation that we followed to collect gesture samples. To that end, we recruited 36 visually impaired participants and divided them into two main groups of low-vision and blind people respectively. We then examined their touch-based gesture preferences in terms of number of strokes, multi-touch, and shape angle, as well as their execution in geometric, kinematic and relative terms. For this purpose, we developed a wireless system to simultaneously record sample gestures from several participants, with the possibility of monitoring the capture process. Our results are consistent with previous research regarding the preference of visually impaired users for simple gestures: with one finger, a single stroke, and in one or two cardinal directions. Of the two groups of participants, blind people are less consistent with multi-stroke gestures. In addition, they are more likely than low-vision people to go outside the bounds of the display in the absence of its physical delimitation of, especially with multi-touch gestures. In the case of more complex gestures, rounded shapes are greatly preferred to angular ones, especially by blind people, who have difficulty performing straight gestures with steep or right angles. Based on these results and on previous related research, we offer suggestions to improve gesture accessibility of handheld touchscreen devices.

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Section: Introductionmentioning

confidence: 99%

Analyzing visually impaired people’s touch gestures on smartphones

Buzzi

Leporini

Trujillo

2016

Multimed Tools Appl

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“…Através da memorização, pessoas com experiência podem digitar com sucesso sem olhar para o dispositivo, mas apenas após anos de êxito, utilizando sempre o retorno da tela como guia [24].…”

Section: Módulo De Entradaunclassified

“…Dispositivos com tela sensível ao toque geram vários problemas de interação para as PCDV, pois dependem completamente da tela para fornecer retorno ao usuário [24]. A leitura da tela pode ser usada para amenizar essa limitação.…”

Section: Módulo De Entradaunclassified

Tirésias: um modelo para acessibilidade ubíqua orientado à deficiência visual

Falk

Tavares

Barbosa

2013

Revista Brasileira De Computação Aplicada

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Resumo: Observa-se hoje um crescimento do número de dispositivos móveis disponíveis no mercado. Esses aparelhos estão cada vez mais ao alcance da população, seja pelo valor, cada vez mais acessível, seja pela facilidade de uso. Apesar disso, os sistemas operacionais desses dispositivos não estão preparados para atender pessoas com determinados tipos de deficiência, principalmente quando se trata de problemas visuais. O presente trabalho tem por objetivo propor um modelo de acessibilidade para dispositivos móveis, orientado ao suporte de pessoas que possuam algum nível de deficiência visual. Também são descritos cenários onde o modelo pode ser aplicado e o protótipo que foi desenvolvido para validá-los. Por fim, são apresentados os resultados obtidos após a execução dos cenários propostos. Palavras IntroduçãoHá aproximadamente vinte anos, Mark Weiser introduziu o conceito de computação ubíqua [1], prevendo um mundo onde dispositivos computacionais estariam presentes em objetos, ambientes e nos próprios seres humanos, interagindo naturalmente com os usuários sem que fossem percebidos. Dez anos após, Satyanarayanan reforçou o conceito através de um artigo considerado clássico [2].Nos últimos anos a evolução da tecnologia vem viabilizando a computação ubíqua, pois os equipamentos móveis estão cada vez menores e mais poderosos. Além disso, o advento das tecnologias de comunicação sem fio permitiu aos equipamentos acessarem serviços em qualquer lugar e a qualquer momento. Adicionalmente, a

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“…Most blind people possess at least one cell phone (Guerreiro, 2008) and are able operate them at a basic level i.e. to perform and receive calls.…”

Section: Introductionmentioning

confidence: 99%

“…Nevertheless, the feedback is restricted to audio output and no information about letter placement on the keypad is available. This approach forces the user to try to find the desired letter, where they often commit several errors in the process (Guerreiro, 2008) and can lead to situations where s/he simply gives up. This is especially true for those users that are neither tech-savvy nor comfortable exploring new functionalities.…”

Section: Introductionmentioning

confidence: 99%

Proficient blind users and mobile text-entry

Nicolau

Guerreiro

Jorge

et al. 2010

Proceedings of the 28th Annual European Conference on Cognitive Ergonomics

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Motivation-Understand how NavTap, an assistive text-entry method, stands in relation to traditional approaches. Research approach-We performed a betweensubjects text-entry study with 12 blind users proficient with MultiTap and five blind users proficient with NavTap. Participants were asked to input ten sentences with different length and complexity. Findings/Design-MultiTap significantly outperformed NavTap when considering text entry speed, confirming its theoretical advantage. However, when considering method effectiveness, NavTap's less experienced participants committed significantly fewer errors, indicating that it is both easier to learn and use, reaffirming it is an alternative for those unable to adjust to demanding adaptations. Research limitations/Implications-Before NavTap appeared its users were unable to input text in a mobile device. Indeed, existing data make it difficult to assess differences between the users of either method. Further, NavTap users had less experience using the method (four months) than MultiTap (years). Originality/Value-We contribute to understanding the limitations and merits of different text-entry approaches for blind people, after extensive usage. Take away message-Different methods have different limitations and values. Selecting a match for a particular user may depend on his individual differences.

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Mobile text-entry models for people with disabilities

Cited by 11 publications

References 1 publication

Analyzing visually impaired people’s touch gestures on smartphones

Analyzing visually impaired people’s touch gestures on smartphones

Tirésias: um modelo para acessibilidade ubíqua orientado à deficiência visual

Proficient blind users and mobile text-entry

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