Andersen G J, Atchley P
Department of Psychology, University of California, Riverside 92521, USA.
Psychol Aging. 1995 Dec;10(4):650-8. doi: 10.1037//0882-7974.10.4.650.
The present study examined age-related differences in sensitivity to optic flow for the detection of 3-D surfaces. Observers were presented with optic flow displays simulating either a 3-D corrugated surface or a random velocity pattern and were asked to detect the 3-D corrugated surface display. Performance decrements were found for older (mean age = 71) compared with younger (mean age = 21) observers across variations in density and corrugation frequency. Older observers also showed performance decrements for a motion coherence task, but performance on this task was not significantly correlated with performance on the 3-D surface detection task. These results suggest that performance on 2-D motion tasks is not necessarily predictive of performance on complex 3-D motion tasks. In addition, the results suggest that different processes underlie the analysis of 2-D and 3-D motion.
本研究考察了在检测三维表面时，视觉流敏感性的年龄相关差异。向观察者呈现模拟三维波纹表面或随机速度模式的视觉流显示，并要求他们检测三维波纹表面显示。与年轻观察者（平均年龄 = 21岁）相比，年长观察者（平均年龄 = 71岁）在密度和波纹频率变化时，表现出性能下降。年长观察者在运动连贯性任务中也表现出性能下降，但该任务的表现与三维表面检测任务的表现没有显著相关性。这些结果表明，二维运动任务的表现不一定能预测复杂三维运动任务的表现。此外，结果表明二维和三维运动分析背后存在不同的过程。
