Belopolsky Artem V, Peterson Matthew S, Kramer Arthur F
The Department of Psychology, Beckman Institute, University of Illinois, Urbana-Champaign, 405 N. Mathews Avenue, Urbana, IL 61801, USA.
Brain Res Cogn Brain Res. 2005 Aug;24(3):453-66. doi: 10.1016/j.cogbrainres.2005.02.023. Epub 2005 Apr 9.
Preview benefit is an attentional phenomenon that enables observers to selectively search through new information in the visual field. In a preview search task, objects are presented in two sets, separated by a time interval (preview interval), and with the second set (new objects) containing the target. Event-related brain potentials (ERPs) were used to investigate whether preview benefit occurs via maintenance of inhibition of the old objects during the preview interval. ERPs time-locked to a color probe indicated that the old objects were actively attended rather than inhibited during the preview interval. Follow-up behavioral experiments produced converging results. The results suggest that, although participants might be using inhibition at later stages of the preview interval, they are not maintaining inhibition on the old objects throughout most of the preview interval.
预览益处是一种注意力现象，它使观察者能够在视野中对新信息进行选择性搜索。在预览搜索任务中，物体以两组呈现，两组之间有一个时间间隔（预览间隔），且第二组（新物体）包含目标。事件相关脑电位（ERP）被用于研究预览益处是否通过在预览间隔期间维持对旧物体的抑制来实现。与颜色探测同步的ERP表明，在预览间隔期间，旧物体是被积极关注而非被抑制的。后续的行为实验也得出了一致的结果。结果表明，尽管参与者可能在预览间隔的后期阶段使用了抑制，但在预览间隔的大部分时间里，他们并未对旧物体维持抑制。
