Assumptions considered harmful: the need to redefine usability

  • Authors:
  • Heike Winschiers;Jens Fendler

  • Affiliations:
  • Department of Software Engineering, Polytechnic of Namibia, Windhoek, Namibia;Department of Software Engineering, Polytechnic of Namibia, Windhoek, Namibia

  • Venue:
  • UI-HCII'07 Proceedings of the 2nd international conference on Usability and internationalization
  • Year:
  • 2007

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Abstract

A cultural evaluation of Usability Engineering in the Namibian context reveals a number of good practices as well as locally inadequate methods. One major challenge in cross-cultural Usability Engineering is the implicit western understanding of usability and its associated assumptions which often lead to a locally inappropriate usability evaluation. Conceptualisation sessions held with different Namibian user groups confirmed a deviating perception of the term "usability". None of the groups mentioned terms "commonly" associated with "usability" such as speed, learnable, or memorable. Thus standard usability testing comprises a dual bias through the western definition of usability and the related choice of methods which aim to test an already biased objective. We therefore suggest an ethno-centric software development framework which incorporates a contextual redefinition of usability.