Pavan Andrea, Greenlee Mark W
Universität Regensburg, Institut für Psychologie, Experimental and Clinical Neuroscience Study Programme, Universitätsstr. 31, 93053, Regensburg, Germany; University of Lincoln, School of Psychology, Brayford Pool, Lincoln, LN6 7TS, United Kingdom.
Universität Regensburg, Institut für Psychologie, Experimental and Clinical Neuroscience Study Programme, Universitätsstr. 31, 93053, Regensburg, Germany.
PLoS One. 2015 Jan 23;10(1):e0117233. doi: 10.1371/journal.pone.0117233. eCollection 2015.
The motion after-effect (MAE) persists in crowding conditions, i.e., when the adaptation direction cannot be reliably perceived. The MAE originating from complex moving patterns spreads into non-adapted sectors of a multi-sector adapting display (i.e., phantom MAE). In the present study we used global rotating patterns to measure the strength of the conventional and phantom MAEs in crowded and non-crowded conditions, and when attention was directed to the adapting stimulus and when it was diverted away from the adapting stimulus. The results show that: (i) the phantom MAE is weaker than the conventional MAE, for both non-crowded and crowded conditions, and when attention was focused on the adapting stimulus and when it was diverted from it, (ii) conventional and phantom MAEs in the crowded condition are weaker than in the non-crowded condition. Analysis conducted to assess the effect of crowding on high-level of motion adaptation suggests that crowding is likely to affect the awareness of the adapting stimulus rather than degrading its sensory representation, (iii) for high-level of motion processing the attentional manipulation does not affect the strength of either conventional or phantom MAEs, neither in the non-crowded nor in the crowded conditions. These results suggest that high-level MAEs do not depend on attention and that at high-level of motion adaptation the effects of crowding are not modulated by attention.
运动后效（MAE）在拥挤条件下依然存在，即当适应方向无法被可靠感知时。源自复杂运动模式的MAE会扩散到多区域适应显示的未适应区域（即幻像MAE）。在本研究中，我们使用全局旋转模式来测量在拥挤和非拥挤条件下，以及当注意力指向适应刺激和从适应刺激上转移时，传统MAE和幻像MAE的强度。结果表明：（i）对于非拥挤和拥挤条件，以及当注意力集中在适应刺激上和从适应刺激上转移时，幻像MAE都比传统MAE弱；（ii）拥挤条件下的传统MAE和幻像MAE比非拥挤条件下的弱。为评估拥挤对高水平运动适应的影响而进行的分析表明，拥挤可能会影响对适应刺激的觉察，而非降低其感觉表征；（iii）对于高水平运动处理，注意力操作在非拥挤和拥挤条件下均不会影响传统MAE或幻像MAE的强度。这些结果表明，高水平MAE不依赖于注意力，并且在高水平运动适应时，拥挤效应不受注意力调节。
