VR presentations
All prototype VR software we used for this study was specially developed by the company PR NETWORK Co. (Fukuoka, Japan). The author (YY) owns the copyright of this software. The natural landscape presentation was the presentation used in our previous study. Specifically, the VR reproduced a large film screen either in a cinema or set up outdoors (on a beach or in a garden), on which the images were projected. Natural scenes of animals exhibiting little movement, or of the sea or rivers, were projected onto the screen (Fig. Prepared VR presentations. (