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Jacob P. Somervell


Publications by Jacob P. Somervell (bibliography)

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Ganoe, Craig, Somervell, Jacob P., Neale, Dennis C., Isenhour, Philip, Carroll, John M., Rosson, Mary Beth and McCrickard, D. Scott (2003): Classroom BRIDGE: using collaborative public and desktop timelines to support activity awareness. In: Proceedings of the 16th annural ACM Symposium on User Interface Software and Technology November, 2-5, 2003, Vancouver, Canada. pp. 21-30. http://doi.acm.org/10.1145/964696.964699

Classroom BRIDGE supports activity awareness by facilitating planning and goal revision in collaborative, project-based middle school science. It integrates large-screen and desktop views of project times to support incidental creation of awareness information through routine document transactions, integrated presentation of awareness information as part of workspace views, and public access to subgroup activity. It demonstrates and develops an object replication approach to integrating synchronous and asynchronous distributed work for a platform incorporating both desktop and large-screen devices. This paper describes an implementation of these concepts with preliminary evaluation data, using timeline-based user interfaces.

© All rights reserved Ganoe et al. and/or ACM Press

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McCrickard, D. Scott, Chewar, C. M., Somervell, Jacob P. and Ndiwalana, Ali (2003): A model for notification systems evaluation -- assessing user goals for multitasking activity. In ACM Transactions on Computer-Human Interaction, 10 (4) pp. 312-338. http://doi.acm.org/10.1145/966930.966933

Addressing the need to tailor usability evaluation methods (UEMs) and promote effective reuse of HCI knowledge for computing activities undertaken in divided-attention situations, we present the foundations of a unifying model that can guide evaluation efforts for notification systems. Often implemented as ubiquitous systems or within a small portion of the traditional desktop, notification systems typically deliver information of interest in a parallel, multitasking approach, extraneous or supplemental to a user's attention priority. Such systems represent a difficult challenge to evaluate meaningfully. We introduce a design model of user goals based on blends of three critical parameters -- interruption, reaction, and comprehension. Categorization possibilities form a logical, descriptive design space for notification systems, rooted in human information processing theory. This model allows conceptualization of distinct action models for at least eight classes of notification systems, which we describe and analyze with a human information processing model. System classification regions immediately suggest useful empirical and analytical evaluation metrics from related literature. We present a case study that demonstrates how these techniques can assist an evaluator in adapting traditional UEMs for notification and other multitasking systems. We explain why using the design model categorization scheme enabled us to generate evaluation results that are more relevant for the system redesign than the results of the original exploration done by the system's designers.

© All rights reserved McCrickard et al. and/or ACM Press

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