A.E. Hühn

On the use of virtual environments for the evaluation of location-based applications

User experience (UX) research on pervasive technologies faces considerable challenges regarding todays mobile context-sensitive applications: evaluative field studies lack control, whereas lab studies miss the interaction with a dynamic context. This dilemma has inspired researchers to use virtual environments (VEs) to acquire control while offering the user a rich contextual experience. Although promising, these studies are mainly concerned with usability and the technical realization of their setup. Furthermore, previous setups leave room for improvement regarding the users immersive experience. This paper contributes to this line of research by presenting a UX case study on mobile advertising with a novel CAVE-smartphone interface. We conducted two experiments in which we evaluated the intrusiveness of a mobile location-based advertising app in a virtual supermarket. The results confirm our hypothesis that context-congruent ads lessen the experienced intrusiveness thereby demonstrating that our setup is capable of generating preliminary meaningful results with regards to UX. Furthermore, we share insights in conducting these studies.

Location-based ads and exposure to health and risk messages

Many of us use smartphones, and many smartphones are equipped with the Global Positioning System (GPS). This enables health promoters to send us messages on specific locations where healthy behavior is possible or where we are at risk of unhealthy behavior. Until now, the practice of sending location-based messages has been mostly restricted to commercial advertisements, most often in retail settings. However, opportunities for health promotion practice are vast. For one, location-based messages can be used to complement environmental interventions, where the environment is changed to promote health behavior. Second, location-based messages incorporate opportunities to tailor these messages to individual characteristics of the recipient, increasing perceived relevance. Finally, location-based messages offer the distinct possibility to communicate context-dependent social norm information. Five preliminary studies tested the effects of location-based messages targeting food choice. The results suggest that sending location-based messages is feasible and can be effective. Future studies should explore which messages are most effective under which circumstances.