This study investigated how global and local information about attentional demands influence attentional control, with a special interest in whether one information source dominates when they conflict. In Experiment 1, we manipulated proportion congruence in two blocks (i.e., mostly congruent versus mostly incongruent) of a Stroop task to create different global demands (i.e., low versus high, respectively). Additionally, we created different local demands by embedding 10-trial lists in each block that varied in their proportion congruence (10% to 90% congruent), and half the lists were preceded by a valid precue explicitly informing participants of upcoming attentional demands. Stroop effects were smaller in mostly incongruent compared with mostly congruent blocks demonstrating the influence of global information. Stroop effects also varied according to the proportion congruence of the abbreviated lists and differed between cued and uncued lists (i.e., cueing effect), demonstrating the influence of local information. Critically, we found that global and local information interacted, such that the cueing effect differed between the two blocks. While there was evidence that participants used the precue to relax control for mostly congruent lists within the mostly congruent block, the cueing effect was absent within the mostly incongruent block. In Experiment 2, we replicated the latter pattern and thereby provided further evidence that participants do not use local precues to relax control when attentional demands are globally high. The findings suggest that both global and local information sources influence the control of attention, and global information dominates local expectations when the information sources collide.

本研究调查了有关注意力需求的全球和本地信息如何影响注意力控制，特别感兴趣的是当它们发生冲突时，一个信息源是否占主导地位。在实验 1 中，我们在 Stroop 任务的两个块中操纵比例一致性（即，大部分一致与大部分不一致）以创建不同的全局需求（即分别为低与高）。此外，我们通过在每个区块中嵌入 10 个试验列表来创建不同的本地需求，这些列表的比例一致（10% 到 90% 一致）不同，并且一半列表之前有一个有效的 precue，明确告知参与者即将到来的注意力需求。与大多数一致的块相比，大多数不一致的 Stroop 效应较小，这表明了全局信息的影响。Stroop 效应也根据缩写列表的比例一致性而变化，并且在提示列表和未提示列表之间存在差异（即提示效应），证明了本地信息的影响。至关重要的是，我们发现全局信息和局部信息相互作用，因此两个块之间的提示效果不同。虽然有证据表明参与者使用前提示来放松对大部分一致区块内大部分一致列表的控制，但在大部分不一致的区块中没有提示效应。在实验 2 中，我们复制了后一种模式，从而提供了进一步的证据表明，当注意力需求全球都很高时，参与者不会使用局部预兆来放松控制。研究结果表明，全球和本地信息来源都会影响注意力的控制，