2.7. Procedure
The experiment was performed in a VR-room with dimensions of 4.02 x 4.77 m. The length of each session was approximately 60 min. As the purpose was to induce relaxation, anxiety and depression symptoms were assessed to keep these symptoms from acting as extraneous variables. The participants completed the pretest VAS and SAM measures. Next, they were trained in the use of the navigation and interaction devices. The experiment was performed individually. At the beginning, participants listened to relaxing music; the initial appearance of the “House of Relaxation” was the same for all the groups, but participants were able to change it into a relaxing environment. During the experiment, a narrative with some instructions guided participants in doing different tasks in the “House of Relaxation”. All the groups had to select affective pictures and relaxing self-statements and then watch a video with a relaxing scene. Only the groups where sense of touch was stimulated (VR_MIP + Touch and VR-MIP + Touch & Smell) did a task where they had to touch the artificial grass while they were watching virtual grass; likewise, only the groups where the olfactory stimulus was used (VR-MIP + Smell and VRMIP + Touch & Smell) did a task where they had to smell the lavender scent in the room while they were watching and interacting with a meadow in the VR environment and listening to sounds of nature. The narrative also guided participants in doing some customization tasks in the House of Relaxation (e.g., changing the furniture, changing the color of the walls, changing the floor into grass or sand, or changing the exterior landscape). Next, participants were asked to look at the relaxing environment and think about their personal meanings and how they were feeling. Finally, participants were asked to fill in the post-test VAS, SAM, and Presence-SAM measures. Fig. 3 shows the procedure for each group.
2.7. กระบวนการ The experiment was performed in a VR-room with dimensions of 4.02 x 4.77 m. The length of each session was approximately 60 min. As the purpose was to induce relaxation, anxiety and depression symptoms were assessed to keep these symptoms from acting as extraneous variables. The participants completed the pretest VAS and SAM measures. Next, they were trained in the use of the navigation and interaction devices. The experiment was performed individually. At the beginning, participants listened to relaxing music; the initial appearance of the “House of Relaxation” was the same for all the groups, but participants were able to change it into a relaxing environment. During the experiment, a narrative with some instructions guided participants in doing different tasks in the “House of Relaxation”. All the groups had to select affective pictures and relaxing self-statements and then watch a video with a relaxing scene. Only the groups where sense of touch was stimulated (VR_MIP + Touch and VR-MIP + Touch & Smell) did a task where they had to touch the artificial grass while they were watching virtual grass; likewise, only the groups where the olfactory stimulus was used (VR-MIP + Smell and VRMIP + Touch & Smell) did a task where they had to smell the lavender scent in the room while they were watching and interacting with a meadow in the VR environment and listening to sounds of nature. The narrative also guided participants in doing some customization tasks in the House of Relaxation (e.g., changing the furniture, changing the color of the walls, changing the floor into grass or sand, or changing the exterior landscape). Next, participants were asked to look at the relaxing environment and think about their personal meanings and how they were feeling. Finally, participants were asked to fill in the post-test VAS, SAM, and Presence-SAM measures. Fig. 3 shows the procedure for each group.
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