Detection of scene-relative object movement and optic flow parsing across the adult lifespan.
Detection of scene-relative object movement and optic flow parsing across the adult lifespan.
复制标题
DOI：
10.1167/jov.20.9.12
复制
发表时间：
2020-09-02
影响因子：
1.8
通讯作者：
Warren PA
中科院分区：
文献类型：
--
作者：
Evans L;Champion RA;Rushton SK;Montaldi D;Warren PA
安全地四处移动关键取决于我们检测物体移动的能力。这是困难的，因为视网膜运动可能来自物体运动或我们自己的运动。在这里，我们调查的能力，检测场景相对对象的运动，使用神经机制称为光流解析。这种机制的作用是减少由自我运动引起的视网膜运动。由于老年观察者在视觉运动处理方面表现出明显的变化，我们考虑了广泛的年龄范围（N = 30，范围：20-76岁）的表现。在实验1中，我们测量的阈值可靠地区分场景相对运动方向的探头之间的三维物体的移动速度来模拟观察者的运动。这项任务的表现与年龄无关，这表明从视网膜信息中检测场景相对物体运动的能力在衰老中得以保留。在实验2中，我们研究了支持这种能力的基本光流解析机制的变化，使用一个完善的任务，测量全球减去光流的大小。我们发现了年龄和全球流量减少之间正相关的强有力证据。这些数据表明，在自我运动过程中，从视觉信息中识别物体运动的能力在衰老过程中得以保留，但支撑这种能力的流解析机制发生了变化。我们认为，这些变化反映了补偿处理需要抵消其他损害的老化视觉系统。
Moving around safely relies critically on our ability to detect object movement. This is made difficult because retinal motion can arise from object movement or our own movement. Here we investigate ability to detect scene-relative object movement using a neural mechanism called optic flow parsing. This mechanism acts to subtract retinal motion caused by self-movement. Because older observers exhibit marked changes in visual motion processing, we consider performance across a broad age range (N = 30, range: 20–76 years). In Experiment 1 we measured thresholds for reliably discriminating the scene-relative movement direction of a probe presented among three-dimensional objects moving onscreen to simulate observer movement. Performance in this task did not correlate with age, suggesting that ability to detect scene-relative object movement from retinal information is preserved in ageing. In Experiment 2 we investigated changes in the underlying optic flow parsing mechanism that supports this ability, using a well-established task that measures the magnitude of globally subtracted optic flow. We found strong evidence for a positive correlation between age and global flow subtraction. These data suggest that the ability to identify object movement during self-movement from visual information is preserved in ageing, but that there are changes in the flow parsing mechanism that underpins this ability. We suggest that these changes reflect compensatory processing required to counteract other impairments in the ageing visual system.
登录
查看更多内容
影响因子：
3.7
作者：
Fajen BR;Matthis JS
通讯作者：
Matthis JS
影响因子：
1.8
作者：
Billino, Jutta;Pilz, Karin S.
通讯作者：
Pilz, Karin S.
影响因子：
4.4
作者：
Bogfjellmo, Lotte-Guri;Bex, Peter J.;Falkenberg, Helle K.
通讯作者：
Falkenberg, Helle K.
DOI：
10.3758/bf03212076
发表时间：
2000-07-01
期刊：
PERCEPTION & PSYCHOPHYSICS
影响因子：
--
作者：
Freeman, TCA;Banks, MS;Crowell, JA
通讯作者：
Crowell, JA
影响因子：
2.5
作者：
Hlavacka, F;Mergner, T;Bolha, B
通讯作者：
Bolha, B