Temporal dynamics of attentional selection of space, features and featureconjunctions in human vision

该项目将研究在相关刺激的注意选择同时基于多个属性（如空间位置或基本特征（例如颜色或方向））的情况下，视觉注意的时间动态。以前的研究已经获得了看似矛盾的结果：虽然一些研究报告了一个强大的，层次的相互依赖性的注意力选择的空间和功能，其他研究发现，促进出席功能在整个视野，结果意味着相当大的独立性这些机制。我们假设，这些相互矛盾的结果可以解释在以前的研究中使用的刺激的时间差异。拟议的研究旨在通过比较大脑对以前方法中使用的不同类型刺激的反应来调和这些差异。此外，我们将首次研究当选择基于多个属性时注意转移的时间过程。本研究共进行了六个实验，记录健康成人的事件相关电位（ERP）、稳态视觉诱发电位（SSVEP）和行为反应。该项目将大大有助于我们了解基本的注意力机制，并将提高我们对人类在复杂情况下的表现与时间变化的注意力需求的理解，这种情况与人为因素工程等应用有关。

The proposed project will investigate the temporal dynamics of visual attention under circumstances where attentional selection of relevant stimuli is concurrently based on multiple properties such as spatial location or basic features (e.g. color or orientation). Previous research has obtained seemingly contradictory results: while some studies reported a strong, hierarchical interdependence of attentional selection of space and features, other studies found a facilitation of attended features across the entire visual field, a result that implies considerable independence of these mechanisms. We hypothesize that these conflicting results can be explained by temporal differences in the stimuli used in the previous studies. The proposed studies are aimed at reconciling these discrepancies by comparing the brain responses to the different types of stimuli used in previous approaches. Furthermore, we will for the first time study the time course of attentional shifts when selection is based on multiple properties. Six experiments will be conducted recording event-related potentials (ERPs), steady-state visual evoked potentials (SSVEPs) and behavioral responses in healthy adults. The project will significantly contribute to our understanding of basic attention mechanisms and will improve our understanding of human performance in complex situations with temporally changing attentional demands, a situation relevant for applications such as human factors engineering.