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Disability-Friendly Website Design : Consequences for Nonimpaired Users and Users with Impairments

Schmutz, Sven ; Sauer, Jürgen (Dir.)

Thèse de doctorat : Université de Fribourg, 2018.

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...

Influencing factors in usability tests : the testing situation, the product prototype, and the test user

Sonderegger, Andreas ; Sauer, Jürgen (Dir.) ; Tattersall, Andy (Codir.)

Thèse de doctorat : Université de Fribourg, 2010.

Training in process control : supporting performance in consideration of operator characteristics

Burkolter, Dina ; Sauer, Jürgen (Dir.) ; Manzey, Dietrich (Codir.)

Thèse de doctorat : Université de Fribourg, 2010.

This doctoral thesis investigated how training can best support process control performance in consideration of individual differences, i.e. operator characteristics. Process control can be found in industries that control large chemical, energy or thermal processes and is highly safety-critical. The research question was approached through experimental studies conducted with a simulated process...