Rater bias: the influence of hedonic quality on usability questionnaires

Authors:
Stefanie Harbich;Sonja Auer
Affiliations:
CT IC 7, User Interface Design, Siemens AG, Munich, Germany;CT IC 7, User Interface Design, Siemens AG, Munich, Germany
Venue:
INTERACT'05 Proceedings of the 2005 IFIP TC13 international conference on Human-Computer Interaction
Year:
2005

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Abstract

In this study of various evaluation-instruments, subjects fulfilled sev-eral tasks on two different operating systems and answered several question-naires, among them AttrakDiffTMand ISONORM 9241/10, and objective meas-ures were taken. A correlation between the “hedonic quality – identity”-scale of the AttrakDiffTM and the ISONORM 9241/10 was found. As the ISONORM 9241/10 measures usability as described in ISO 9241-10 and not hedonic quali-ty, the hedonic quality seems to have an influence on the tester ratings of usability. This is supported by the finding, that the hedonic quality does not correlate with the objective measures and therefore does not have any effective influence on the efficiency component of usability.