Leibniz Research Centre for Working Environment and Human Factors, Ardeystrasse 67, 44139, Dortmund, Germany.
Psychol Res. 2012 Nov;76(6):730-5. doi: 10.1007/s00426-011-0396-6. Epub 2011 Nov 26.
The aim of this study was to investigate the spatial orienting of visual attention in depth under purely stereoscopic viewing conditions. Random-dot stereograms were used to present disparity-defined target stimuli that were either validly or invalidly cued in depth. In separate tasks, participants responded either to the relative depth of the target (protruding vs. receding) or to its shape (square vs. diamond). Stimulus onset asynchronies (SOAs) between an uninformative exogenous cue and target were varied from 250 to 600 ms. For both tasks, mean response times (RTs) were shorter for validly than invalidly cued target depths and this RT advantage was essentially restricted to the shortest SOA of 250 ms. These results indicate that attention can be reflexively allocated to locations in stereo depth under conditions of low perceptual load, and independent of whether depth is relevant to the task or not.
本研究旨在探究在纯粹的立体视觉条件下，视觉注意力在深度上的空间定位。随机点立体图被用来呈现视差定义的目标刺激，这些刺激在深度上要么是有效提示，要么是无效提示。在单独的任务中，参与者要么对目标的相对深度（突出与缩进）做出反应，要么对其形状（正方形与菱形）做出反应。在无信息的外源性提示和目标之间的刺激起始时距（SOA）从 250 毫秒变化到 600 毫秒。对于这两个任务，与无效提示相比，有效提示的目标深度的平均反应时间（RT）更短，这种 RT 优势基本上仅限于最短的 250 毫秒 SOA。这些结果表明，在低知觉负载条件下，即使深度与任务无关，注意力也可以反射性地分配到立体深度中的位置。
