par Van Der Linden, Jan ;Debue, Nicolas ;Giambra, Annabelle;Van De Leemput, Cécile
Référence elgian Association for Psychological Sciences (BAPS) (05/2014: Leuven)
Publication Non publié, 2014
Poster de conférence
Résumé : Nowadays, multi-touch devices can be found everywhere and are used for many kinds of activities (e.g. work or leisure activities). They create new ways for interacting with technology and often lead users to adopt new usage patterns. Despite this interest and the new features offered it seems that those devices cannot fully replace desktop and laptop computers. The use of gesture on touch sensitive screens imposes a certain number of constraints. Nevertheless, even if specific applications have been developed for devices like tablets and smartphones, the difficulties due to the use of gestures are not always taken into account. Today, computer models (e.g. hybrid laptops) incorporating a touch sensitive screen with a classical environment (operating system and software) made for keyboard/mouse pointing devices are proposed to consumers. These models raise new issues. If one could assume that the use of touch-screen rather than and mouse and keyboard is the easiest way to perform a task with specific applications, we postulate that in a traditional environment it could impair user’s performance. The complexity to generate an accurate fingers gesture and the split attention it requires may lead to a cognitive burden that decreases enjoyment and the mental resources available to perform a task. The experiment was conducted with 70 university students (62 women and 8 men) in a usability laboratory where they were asked to perform several information search tasks on an online encyclopaedia. The tasks had been created in order to require the most commonly used actions (e.g. right click, left click, zooming, scrolling, encoding). Participants were randomly assigned between two conditions: (1) multi-touch sensitive screen use (tablet condition), and (2) keyboard and mouse use (classical computer condition). Task performance, level of experience, satisfaction and enjoyment, as well as cognitive absorption indicators were collected by the use of a questionnaire. Cognitive load was also measured throughout the experiment by the use of an eye-tracking system. Finally, our results suggest that task performance, level of satisfaction and enjoyment are linked to the level of experience and to the cognitive indicators. They bring some interesting insights into the user experience and clarify the added value of multi-touch sensitive screens to computers and some of the psychological impacts of such a usage.