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In this paper, we explore the effectiveness of tactile data encodings usingswell paper in comparison to visual encodings displayed with SVGs for dataperception tasks. By replicating and adapting Cleveland and McGill's graphicalperception study for the tactile modality, we establish a novel tactileencoding hierarchy. In a study with 12 university students, we found thatparticipants perceived visual encodings more accurately when comparing values,judging their ratios with lower cognitive load, and better self-evaluatedperformance than tactile encodings. However, tactile encodings differed fromtheir visual counterparts in terms of how accurately values could be decodedfrom them. This suggests that data physicalizations will require differentdesign guidance than that developed for visual encodings. By providingempirical evidence for the perceptual accuracy of tactile encodings, our workcontributes to foundational research on forms of data representation thatprioritize tactile perception such as tactile graphics.

Let's Get Vysical: Perceptual Accuracy In Visual and Tactile Encodings