文章基本信息

标题：Healthy Older Observers Cannot Use Biological-Motion Point-Light Information Efficiently within 4 m of Themselves
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作者：Isabelle Legault ; Nikolaus F Troje ; Jocelyn Faubert 等
期刊名称：i-Perception
电子版ISSN：2041-6695
出版年度：2012
卷号：3
期号：2
页码：104-111
DOI：10.1068/i0485
出版社：Pion Ltd.
摘要：Healthy aging is associated with a number of perceptual changes, but measures of biological-motion perception have yielded conflicting results. Biological motion provides information about a walker, from gender and identity to speed, direction, and distance. In our natural environment, as someone approaches us (closer distances), the walker spans larger areas of our field of view, the extent of which can be underutilized with age. Yet, the effect of age on biological-motion perception in such real-world scenarios remains unknown. We assessed the effect of age on discriminating walking direction in upright and inverted biological-motion patterns, positioned at various distances in virtual space. Findings indicate that discrimination is worse at closer distances, an effect exacerbated by age. Older adults' performance decreases at distances as far away as 4 m, whereas younger adults maintain their performance as close as 1 m (worse at 0.5 m). This suggests that older observers are limited in their capacity to integrate information over larger areas of the visual field and supports the notion that age-related effects are more apparent when larger neural networks are required to process simultaneous information. This has further implications for social contexts where information from biological motion is critical.
关键词：Biological motion ; aging ; collision avoidance ; complexity