先知先觉
刺激(心理学)
任务切换
提示语
任务(项目管理)
感知
心理学
感觉系统
集合(抽象数据类型)
认知心理学
事件相关电位
认知
计算机科学
神经科学
沟通
认识论
哲学
经济
管理
程序设计语言
作者
Mareike Finke,Carles Escera,Francisco Barceló
出处
期刊:PLOS ONE
[Public Library of Science]
日期:2012-11-12
卷期号:7 (11): e49486-e49486
被引量:21
标识
DOI:10.1371/journal.pone.0049486
摘要
The present study examined the use of foreknowledge in a task-cueing protocol while manipulating sensory updating and executive control in both, informatively and non-informatively pre-cued trials. Foreknowledge, sensory updating (cue switch effects) and task-switching were orthogonally manipulated in order to address the question of whether, and to which extent, the sensory processing of cue changes can partly or totally explain the final task switch costs. Participants responded faster when they could prepare for the upcoming task and if no task-set updating was necessary. Sensory cue switches influenced cue-locked ERPs only when they contained conceptual information about the upcoming task: frontal P2 amplitudes were modulated by task-relevant cue changes, mid-parietal P3 amplitudes by the anticipatory updating of stimulus-response mappings, and P3 peak latencies were modulated by task switching. Task preparation was advantageous for efficient stimulus-response re-mapping at target-onset as mirrored in target N2 amplitudes. However, N2 peak latencies indicate that this process is faster for all repeat trials. The results provide evidence to support a very fast detection of task-relevance in sensory (cue) changes and argue against the view of task repetition benefits as secondary to purely perceptual repetition priming. Advanced preparation may have a stronger influence on behavioral performance and target-locked brain activity than the local effect of repeating or switching the task-set in the current trial.
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