In recent years, there has been a growing interest in enhancing the accessibility of visualizations for people with visual impairments. While much of the research has focused on improving accessibility for screen reader users, the specific needs of people with remaining vision (i.e., low-vision individuals) have been largely unaddressed. To bridge this gap, we conducted a qualitative study that provides insights into how low-vision individuals experience visualizations. We found that participants utilized various strategies to examine visualizations using the screen magnifiers and also observed that the default zoom level participants use for general purposes may not be optimal for reading visualizations. We identified that participants relied on their prior knowledge and memory to minimize the traversing cost when examining visualization. Based on the findings, we motivate a personalized tool to accommodate varying visual conditions of low-vision individuals and derive the design goals and features of the tool.
Strategies and Preferences to Explore Visualization
・まず図の全体像を構築していた
・判例などを記憶することでnavigationの時間を節約していた
Challenges Related to Assistive Technologies
・色盲などの影響がある参加者は複数の色変更ツールを使う必要があった
・デフォルトのズームのレベルが図によっては適切なものではなかった
・拡大ツールとスクリーンリーダを同時に使うことが困難
・平均値を計算するようなタスクが特に困難
Findingsを基に次の議論をGoalを提案
Goal 1: Learn and accommodate the visual condition of the viewer.
Goal 2: Support constructing overview.
Goal 3: Providing Contexts to Minimize Navigation.
Goal 4: Re-render to enforce guidelines.
Goal 5: Leveraging visual perception.
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Abstract
In recent years, there has been a growing interest in enhancing the accessibility of visualizations for people with visual impairments. While much of the research has focused on improving accessibility for screen reader users, the specific needs of people with remaining vision (i.e., low-vision individuals) have been largely unaddressed. To bridge this gap, we conducted a qualitative study that provides insights into how low-vision individuals experience visualizations. We found that participants utilized various strategies to examine visualizations using the screen magnifiers and also observed that the default zoom level participants use for general purposes may not be optimal for reading visualizations. We identified that participants relied on their prior knowledge and memory to minimize the traversing cost when examining visualization. Based on the findings, we motivate a personalized tool to accommodate varying visual conditions of low-vision individuals and derive the design goals and features of the tool.
低視力者のvisualizationsの体験に関して知見を得るための質的研究 ・11名の低視力者に折れ線図や散布図などの図を自由に見た後に値を探すといったのタスクを行ってもらう
Strategies and Preferences to Explore Visualization ・まず図の全体像を構築していた ・判例などを記憶することでnavigationの時間を節約していた Challenges Related to Assistive Technologies ・色盲などの影響がある参加者は複数の色変更ツールを使う必要があった ・デフォルトのズームのレベルが図によっては適切なものではなかった ・拡大ツールとスクリーンリーダを同時に使うことが困難 ・平均値を計算するようなタスクが特に困難
Findingsを基に次の議論をGoalを提案 Goal 1: Learn and accommodate the visual condition of the viewer. Goal 2: Support constructing overview. Goal 3: Providing Contexts to Minimize Navigation. Goal 4: Re-render to enforce guidelines. Goal 5: Leveraging visual perception.