Analysis of Tactile Chart Design

Engel, Christin; Weber, Gerhard

doi:10.1145/3056540.3064955

Cited by 18 publications

(9 citation statements)

References 8 publications

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“…Creating visualizations is equally important to close the loop on visualization literacy. In fact, participants in a study expressed they do want to create visualizations [EW17a]. Accessible interfaces and methods of creating visualizations can empower visually impaired people to be active producers rather than passive consumers.…”

Section: Opportunities and Challengesmentioning

confidence: 99%

“…Braille labels are usually accompanied to convey precise values and textual elements such as legends. A study demonstrated that a tactile scatter plot enables faster reading of a correlation pattern compared to a braille-based table and speechbased table [WM18], although different chart types can lead to different user experiences and preferences [EW18,EW17a]. The haptic modality is absent of a tactile graphic's physicality but uses force feedback to interact with a virtual graphic.…”

Section: Sensory Modalitymentioning

confidence: 99%

“…Visually impaired people expect to recognize guiding elements for understanding data encoding, such as axes, tick marks, labels, and legends [EW17b]. The successful recognition of such guiding elements can help to keep a sense of orientation [EW17a], which is essential for both tactile and auditory graphs [EW17a, TBC * 16]. It is preferable for legends to be placed at the top-left corner for faster discoverability [EW17a].…”

Section: A Preliminary Model For Visualization Accessibilitymentioning

confidence: 99%

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Accessible Visualization: Design Space, Opportunities, and Challenges

Kim

Joyner

Riegelhuth

et al. 2021

Computer Graphics Forum

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Visualizations are now widely used across disciplines to understand and communicate data. The benefit of visualizations lies in leveraging our natural visual perception. However, the sole dependency on vision can produce unintended discrimination against people with visual impairments. While the visualization field has seen enormous growth in recent years, supporting people with disabilities is much less explored. In this work, we examine approaches to support this marginalized user group, focusing on visual disabilities. We collected and analyzed papers published for the last 20 years on visualization accessibility. We mapped a design space for accessible visualization that includes seven dimensions: user group, literacy task, chart type, interaction, information granularity, sensory modality, assistive technology. We described the current knowledge gap in light of the latest advances in visualization and presented a preliminary accessibility model by synthesizing findings from existing research. Finally, we reflected on the dimensions and discussed opportunities and challenges for future research.

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Section: Opportunities and Challengesmentioning

confidence: 99%

Section: Sensory Modalitymentioning

confidence: 99%

Section: A Preliminary Model For Visualization Accessibilitymentioning

confidence: 99%

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Accessible Visualization: Design Space, Opportunities, and Challenges

Kim

Joyner

Riegelhuth

et al. 2021

Computer Graphics Forum

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“…Data sonification has been used on various visualizations such as line graphs, bar graphs, and maps [90,24,42]. Tactile visualizations realized via haptic feedback, braille display, or embossed prints are another popular approach to enhance accessibility for people with visual impairments [83,27,30,28,29,61,89,33,43,26]. Yet, the low-resolution nature of tactile visualizations limits their use for more complex visualizations [29].…”

Section: Visualization Accessibility For Visually Impaired Peoplementioning

confidence: 99%

Communicating Visualizations without Visuals: Investigation of Visualization Alternative Text for People with Visual Impairments

Jung¹,

Mehta²,

Kulkarni³

et al. 2021

Preprint

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Alternative text is critical in communicating graphics to people who are blind or have low vision. Especially for graphics that contain rich information, such as visualizations, poorly written or an absence of alternative texts can worsen the information access inequality for people with visual impairments. In this work, we consolidate existing guidelines and survey current practices to inspect to what extent current practices and recommendations are aligned. Then, to gain more insight into what people want in visualization alternative texts, we interviewed 22 people with visual impairments regarding their experience with visualizations and their information needs in alternative texts. The study findings suggest that participants actively try to construct an image of visualizations in their head while listening to alternative texts and wish to carry out visualization tasks (e.g., retrieve specific values) as sighted viewers would.The study also provides ample support for the need to reference the underlying data instead of visual elements to reduce users' cognitive burden. Informed by the study, we provide a set of recommendations to compose an informative alternative text.

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“…It is mainly due to the low use rate of tactile scatter plots in everyday life. Engel and Weber analyzed 69 tactile charts to develop design guidelines for tactile charts 10) . These tactile charts were collected from publications and tactile graphics guidelines.…”

Section: Introductionmentioning

confidence: 99%

[Paper] Usefulness of Tactile Scatter Plots

Watanabe

Mizukami

2019

MTA

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The goal of making a scatter plot is to visually identify the type of relationship between two quantitative variables quickly. To explore whether a scatter plot can achieve this goal when it is made in the form of a tactile graph and presented to blind people, we conducted an experiment in which x -y data sets were presented to blind participants in three data representations: tactile graph, tactile table, and electronic table, and the participants were asked to identify the type of relationship between two variables. Under all presentation conditions, eight participants or more achieved 100% correct rate.Tactile graphs were understood with the shortest time, tactile tables with the second shortest, and electronic tables needed the longest time. This time differences were due to the different strategies for identifying the relationships. Both tactile graph and tactile table conditions gained significantly higher subjective ratings than the electronic table condition. These results show the usefulness of tactile scatter plots for blind people although it is limited to the present experimental condition.

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Analysis of Tactile Chart Design

Cited by 18 publications

References 8 publications

Accessible Visualization: Design Space, Opportunities, and Challenges

Accessible Visualization: Design Space, Opportunities, and Challenges

Communicating Visualizations without Visuals: Investigation of Visualization Alternative Text for People with Visual Impairments

[Paper] Usefulness of Tactile Scatter Plots

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