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The fidelity of prototype and testing environment in usability tests

Uebelbacher, Andreas ; Sauer, Jürgen (Dir.)

Thèse de doctorat : Université de Fribourg, 2014.

This doctoral thesis investigated what setup of a usability test can best support valid test outcomes. Several aspects of contextual fidelity were manipulated in experimental usability studies, to examine their impact on test results. The first study demonstrated that the medium of prototype presentation has effects on test outcomes, which have not been found in previous research. Using a more...

The Influence of Product Aesthetics and Usability over the Course of Time: A Longitudinal Field Experiment

Sonderegger, Andreas ; Zbinden, Gerold ; Uebelbacher, Andreas ; Sauer, Juergen

A longitudinal field experiment was carried out over a period of two weeks to examine the influence of product aesthetics and inherent product usability. A 2 x 2 x 3 mixed design was used in the study, with product aesthetics (high / low) and usability (high / low) being manipulated as between-subjects variables and exposure time as a repeated-measures variable (3 levels). A sample of 60 mobile...