SHIFTING ATTENTION IN VISUAL SPACE - THE EFFECTS OF PERIPHERAL CUEING ON BRAIN CORTICAL POTENTIALS
SHIFTING ATTENTION IN VISUAL SPACE - THE EFFECTS OF PERIPHERAL CUEING ON BRAIN CORTICAL POTENTIALS
复制标题
DOI：
10.3109/00207459508986109
复制
发表时间：
1995-01-01
影响因子：
2.2
通讯作者：
ANLLOVENTO, L
中科院分区：
文献类型：
--
作者：
ANLLOVENTO, L
使用事件相关电位（ERP）和反应时间在人类身上研究了外周线索引起的注意力转移的影响。受试者在出现目标后释放按键，然后在相同（有效）或相反（无效）视野中出现预测提示，或双边非预测提示。分隔提示和目标的刺激起始异步 (SOA) 为 200 或 600 毫秒。受试者对有效提示的目标做出反应时速度更快、更准确。 ERP 的注意力调节表现为在有效提示目标后后电极部位 P1-N1 幅度的增强。此外，有效试验中 P1、N1 和 P3 的潜伏期明显短于无效试验。这些结果只有在 SOA 较长时才有意义，因为当 SOA 仅 200 毫秒时，ERP 不应性会扭曲目标引起的响应。这些发现是在之前的行为和 ERP 提示研究的背景下进行讨论的。
The effects of attentional shifts following peripheral cues were studied in humans using event-related potentials (ERPs) and reaction times. Subjects released a key following the presentation of a target preceded by a predictive cue in the same (valid) or the opposite (invalid) visual field, or a bilateral, non-predictive cue. The stimulus onset asynchrony (SOA) separating cue and target was either 200 or 600 ms. Subjects were faster and more accurate when responding to validly cued targets. Attentional modulation of the ERP was manifested as an enhancement of P1-N1 amplitude at posterior electrode sites following a validly cued target. Furthermore, the latencies of P1, N1 and P3 were significantly shorter in valid trials than in invalid trials. These results only reached significance with the longer SOA, since ERP refractoriness distorted the response evoked by the target when the SOA was only 200 ms. The findings are discussed in the context of previous behavioral and ERP cueing studies.