Within the EMMA project we are also developing PDA-versions of the virtual environments. These are intended to remind the user of the actual immersive environments and take the user back to the same mood as experienced there. The PDA-applications can be used in emotional situations in real life. For example when one has a panic attack on the bus one could use the PDA-version of Relaxation Island to recapture the memory and mood of the immersive environment.

The main goal of the PDA-applications is to enable users of the more comprehensive VR-applications to re-experience feelings from the 3D environment, independent of time and place. The main idea is to bring to mind the feelings that the user experienced in the 3D environment in order to handle the emotional situation at hand.

The PDA-applications will primarily use a combination of small films, sound effects and images to achieve these goals. The small films consist of short films from the 3D environment, and the sound effects are selected pieces from the VR-application. These small films and sound effects are in other words the same that are experienced in the 3D environment. The user will be able to select which part of the 3D environment he or she wants to be exposed to and that is most appropriate for the actual situation. Thus the PDA-application can elicit and arouse several different types of moods and in such a way act as a multiple mood device.