Blandford, A; Furniss, D; Makri, S; Green, TRG; (2008) Evaluating system utility and conceptual fit using CASSM. International Journal of Human Computer Studies , 66 (6) 393 - 409. 10.1016/j.ijhcs.2007.11.005.
|PDF - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader|
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 the 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. © 2007 Elsevier Ltd. All rights reserved.
|Title:||Evaluating system utility and conceptual fit using CASSM|
|Open access status:||An open access version is available from UCL Discovery|
|UCL classification:||UCL > School of Life and Medical Sciences > Faculty of Brain Sciences > Psychology and Language Sciences (Division of) > UCL Interaction Centre|
UCL > School of BEAMS > Faculty of Engineering Science > Computer Science
View download statistics for this item
Activity - last month
Activity - last 12 months
Archive Staff Only: edit this record