Meermeier Annegret, Gremmler Svenja, Lappe Markus
J Vis. 2016 Jun 1;16(8):17. doi: 10.1167/16.8.17.
When we observe a scene, we shift our gaze to different points of interest via saccadic eye movements. Saccades provide high resolution views of objects and are essential for vision. The successful view of an interesting target might constitute a rewarding experience to the oculomotor system. We measured the influence of image content on learning efficiency in saccade control. We compared meaningful pictures to luminance and spatial frequency-matched random noise images in a saccadic adaptation paradigm. In this paradigm a shift of the target during the saccades results in a gradual increase of saccade amplitude. Stimuli were masked at different times after saccade onset. For immediate masking of the stimuli, as well as for their permanent visibility, saccadic adaptation was similar for both types of targets. However, when stimuli were masked 200 ms after saccade onset, adaptation of saccades directed toward the meaningful target stimuli was significantly greater than that of saccades directed toward noise targets. Thus, the percept of a meaningful image at the saccade landing position facilitates learning of the appropriate parameters for saccadic motor control when time constraints exist. We conclude that oculomotor learning, which is traditionally considered a low-level and highly automatized process, is modulated by the visual content of the image.
当我们观察一个场景时，我们会通过眼球的快速跳动将目光转移到不同的兴趣点。快速跳动能提供物体的高分辨率视图，对视觉至关重要。成功看到一个有趣的目标可能会给动眼系统带来一种有回报的体验。我们测量了图像内容对扫视控制中学习效率的影响。在扫视适应范式中，我们将有意义的图片与亮度和空间频率匹配的随机噪声图像进行了比较。在这个范式中，扫视过程中目标的移动会导致扫视幅度逐渐增加。刺激在扫视开始后的不同时间被掩蔽。对于刺激的即时掩蔽以及它们的持续可见性，两种类型的目标的扫视适应是相似的。然而，当刺激在扫视开始后200毫秒被掩蔽时，指向有意义目标刺激的扫视的适应明显大于指向噪声目标的扫视。因此，当存在时间限制时，扫视着陆位置处有意义图像的感知有助于学习扫视运动控制的适当参数。我们得出结论，传统上被认为是一个低级且高度自动化过程的动眼学习，会受到图像视觉内容的调节。
