The keystroke-level model for user performance time with interactive systems
Communications of the ACM
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Proceedings of the 10th International Cross-Disciplinary Conference on Web Accessibility
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ACM Transactions on Computer-Human Interaction (TOCHI)
Identifying emergent behaviours from longitudinal web use
Proceedings of the adjunct publication of the 26th annual ACM symposium on User interface software and technology
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Laboratory studies are a well established practice that present disadvantages in terms of data collection. One of these disadvantages is that laboratories are controlled environments that do not account for unpredicted factors from the real world. Laboratory studies are also obtrusive and therefore possibly biased. The Human-Computer Interaction (HCI) community has acknowledged these problems and has started exploring in-situ observation techniques. These observation techniques allow for bigger participant pools and their environments can conform to the real world. Such real-world observations are particularly important to the accessibility community who has coined the concept accessibility-in-use to differentiate real world from laboratory studies. Real-world observations provide low-level interaction data therefore making a bottom-up analysis possible. This way behaviours emerge from the obtained data instead of looking for predefined models. Some in-situ techniques employ Web logs in which the data is too coarse to infer meaningful user interaction. In some other cases an exhaustive manual modification is required to capture interaction data from a Web application. We describe a tool which is easily deployable in any Web application and captures longitudinal interaction data unobtrusively. It enables the observation of accessibility-in-use and guides the detection of emerging tasks.