A psychological refractory period in access to visual short-term memory and the deployment of visual-spatial attention: Multitasking processing deficits revealed by event-related potentials
A psychological refractory period in access to visual short-term memory and the deployment of visual-spatial attention: Multitasking processing deficits revealed by event-related potentials
复制标题
DOI：
10.1111/j.1469-8986.2007.00503.x
复制
发表时间：
2007-03-01
期刊：
影响因子：
3.7
通讯作者：
Jolicoeur, Pierre
中科院分区：
文献类型：
--
作者：
Brisson, Benoit;Jolicoeur, Pierre
在这个心理不应期（PRP）的实验中，一个音调（T-1），其次是一个视觉目标（T-2）嵌入在一个双边显示器，和一个快速的反应，需要为每个目标。T-1-T-2刺激起始时间（SOA）为300、650或1000 ms。对T-2的平均反应时间随着SOA的降低而增加，复制了众所周知的PRP效应。重要的是，事件相关电位的N2 pc成分随着SOA的降低而逐渐减弱，N2 pc之后的持续后对侧负波（SPCN）的起始潜伏期逐渐延长。基于任务（1）难度的条件分析证实了基于SOA效应的分析。结果表明，导致PRP效应的中央处理干扰了视觉空间注意力的部署（由N2 pc索引），并延迟编码到视觉短期记忆（由SPCN发作潜伏期索引）。
In this psychological refractory period (PRP) experiment, a tone (T-1) was presented, followed by a visual target (T-2) embedded in a bilateral display, and a speeded response was required for each target. The T-1-T-2 stimulus onset asynchrony (SOA) was 300, 650, or 1000 ms. Mean response time to T-2 increased as SOA was reduced, replicating the well-known PRP effect. Importantly, the N2pc component of the event-related potential was progressively attenuated as SOA was reduced, and the onset latency of the sustained posterior contralateral negativity (SPCN) that follows the N2pc was progressively lengthened. Conditional analysis based on Task(1) difficulty corroborated the analyses based on effects of SOA. The results suggest that central processing leading to the PRP effect interferes with the deployment of visual-spatial attention (as indexed by the N2pc) and delays encoding into visual short-term memory (as indexed by the SPCN onset latency).