In: International Journal of Human - Computer Studies
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(Internal working papers DIUF ; 15-03)
This paper compares an emergent interaction modality for the In-Vehicle Infotainment System (IVIS), i.e., gesturing on the steering wheel, with two more popular modalities in modern cars: touch and speech. We conducted a betweensubjects experiment with 20 participants for each modality to assess the interaction performance with the IVIS and the impact on the driving performance. Moreover, we...
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In: Applied Ergonomics
This article examines the influence of socio-cultural background and product value on different outcomes of usability tests. A study was conducted in two different socio-cultural regions, Switzerland and East Germany, which differed in a number of aspects (e.g. economic power, price sensitivity and culture). Product value (high vs. low) was varied by manipulating the price of the product....
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In: UbiComp'13 Adjunct, ACM Press
In this position paper, important issues to consider for the development of smart garments are addressed. A special emphasis is placed on usability and its evaluation in a user-centered design approach. Different factors influencing the outcomes of usability tests are discussed. The effect of design aesthetics as a very important influencing factor in usability tests is addressed in detail and...
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This article examines the influence of mood feedback on different outcomes of teamwork in two different collaborative work environments. Employing a 2 x 2 between-subjects design, mood feedback (present vs. not present) and communication mode (face-to-face vs. video conferencing) were manipulated experimentally. We used a newly developed collaborative communication environment, called EmotiBoard,...
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In: Behaviour & Information Technology
An empirical study examined the effects of two influencing factors in usability tests on user performance and usability ratings. Aesthetics of design (high vs. low) as the main independent factor and prior usage event (positive vs. negative) as a subsidiary independent factor were varied in a between-participants design. 60 participants took part in the experiment, completing a number of typical...
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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...
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In: Applied Ergonomics, 2010, vol. 41, p. 403-410
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In: Applied Ergonomics, 2009, vol. 40, p. 670-677
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Thèse de doctorat : Université de Fribourg, 2010.
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