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Reducing Younger and Older Adults' Spatial Disorientation during Indoor-Outdoor Transitions: Effects of Route Alignment and Visual Access on Wayfinding.

Getting lost could lead to frustration, anxiety, and even fatal accidents. Previous research primarily focused on disorientation in indoor or outdoor environments separately. The indoor-outdoor transition received little attention, yet it is in this complex transition that individuals often lose their way. Therefore, the effects of indoor-outdoor route alignment, visual access, and age on wayfinding performance and spatial cognition were examined. Twenty older adults (aged 18-25) and twenty young adults (aged 65-82) participated in an experiment through desktop Virtual Reality (VR). They traversed indoor-outdoor environments and were informed within a building to quickly navigate an item inside another building. They also drew the route map. Participants repeated tasks in four different environments. Their spatial cognition and wayfinding performance were analyzed. Four main findings were derived. Firstly, the accuracy of global representation of the routes in the indoor-outdoor route alignment environment was higher than that in the non-aligned environment. Secondly, in environments with higher visual access, the accuracy of global representation of the routes for older adults was higher than that with lower visual access. Thirdly, enhancing visual access attenuated the negative impact of the non-aligned route on global representation of the routes. This effect is particularly beneficial for older adults. Fourthly, the younger adults outperformed the older adults in both wayfinding performance and global representation of the routes in indoor-outdoor environments. This difference could potentially be attributed to variations in education level, mental rotation ability, and digital experience. These findings provide valuable implications for urban design and wayfinding strategies.

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