Blandford, A;
Green, TRG;
Furniss, D;
Makri, S;
(2008)
Evaluating system utility and conceptual fit using CASSM.
INT J HUM-COMPUT ST
, 66
(6)
393 - 409.
10.1016/j.ijhcs.2007.11.005.
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Abstract
There is a wealth of user-centred evaluation methods (UEMs) to support the analyst in assessing interactive systems. Many of these support detailed aspects of use-for example: is the feedback helpful? Are labels appropriate? Is the task structure optimal? Few UEMs encourage the analyst to step back and consider how well a system supports users' conceptual understandings and system utility. In this paper, we present CASSM, a method, which focuses on the quality of 'fit' between users and an interactive system. We describe tile methodology of conducting a CASSM analysis and illustrate the approach with three contrasting worked examples (a robotic arm, a digital library system and a drawing tool) that demonstrate different depths of analysis. We show how CASSM can help identify re-design possibilities to improve system utility. CASSM complements established evaluation methods by focusing on conceptual structures rather than procedures. Prototype tool support for completing a CASSM analysis is provided by Cassata, an open source development. (c) 2007 Elsevier Ltd. All rights reserved.
| Type: | Article |
|---|---|
| Title: | Evaluating system utility and conceptual fit using CASSM |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.ijhcs.2007.11.005 |
| Keywords: | CASSM, usability evaluation methods, conceptual structures, co-evolution, USABILITY EVALUATION METHODS, KNOWLEDGE, DESIGN |
| UCL classification: | UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > Div of Psychology and Lang Sciences > UCL Interaction Centre UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Computer Science |
| URI: | https://discovery.ucl.ac.uk/id/eprint/5099 |
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