Towards an improved readability on mobile devices: evaluating adaptive rapid serial visual presentation |
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Affiliation: | 1. College of Information and Computer Science, Southwest University, Chongqing 400715, PR China;2. Center for OPTical IMagery Analysis and Learning (OPTIMAL), Northwestern Polytechnical University, Shannxi 710072, PR China;3. Potsdam Institute for Climate Impact Research (PIK), Potsdam 14473, Germany;4. Institute of Physics, Humboldt University of Berlin, Berlin 12489, Germany;5. Statistics and Mathematics College, Yunnan University of Finance and Economics, Kunming, Yunnan 650221, PR China |
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Abstract: | Can readability on small screens be improved by using adaptive Rapid Serial Visual Presentation (RSVP) that adapts the presentation speed to the characteristics of the text instead of keeping it fixed? In this paper we introduce Adaptive RSVP, describe the design of a prototype on a mobile device, and report findings from a usability evaluation where the ability to read long and short texts was assessed. In a latin-square balanced repeated-measurement experiment, employing 16 subjects, two variants of Adaptive RSVP were benchmarked against Fixed RSVP and traditional text presentation. For short texts, all RSVP formats increased reading speed by 33% with no significant differences in comprehension or task load. For long texts, no differences were found in reading speed or comprehension, but all RSVP formats increased task load significantly. Nevertheless, Adaptive RSVP decreased task load ratings for most factors compared to Fixed RSVP. Causes, implications, and effects of these findings are discussed. |
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