It is well established that identification of words in noise improves when it is preceded by a semantically related word, but comparatively little is known about the effect of subsequent context in guiding word in noise identification. We build on the findings of a previous behavioural study (Chan & Alain, 2019) by measuring neuro-electric brain activity while manipulating the semantic content of a cue that either preceded or followed a word in noise. Participants were more accurate in identifying the word in noise when it was preceded or followed by a cue that was semantically related. This gain in accuracy coincided with a late positive component, which was time-locked to the word in noise when preceded by a cue and time-locked to the cue when it followed the word in noise. Distributed source analyses of this positive component revealed different patterns in source activity between the two temporal conditions. The effects of relatedness also generated an event-related potential modulation around 400 ms (N400) that was present at cue presentation when it followed the word in noise, but not for the word in noise when preceded by the cue, consistent with findings regarding its sensitivity to signal degradation. Exploratory analyses examined a subset of data based on participants’ subjective perceived clarity, which revealed a posterior deflection over the left hemisphere that showed a relatedness effect. We discuss these findings in light of research on prediction as well as a reflective attention framework.

众所周知，噪声中的词识别在语义相关词之前会提高，但对于后续上下文在噪声识别中引导词的影响知之甚少。我们在先前行为研究 (Chan & Alain, 2019) 的发现的基础上，通过测量神经电脑活动，同时操纵在噪音中出现在单词之前或之后的线索的语义内容。当在语义上相关的线索之前或之后，参与者在识别噪音中的单词时更准确。这种准确性的提高与后期的积极成分相吻合，当它在一个提示之前时被时间锁定到噪音中的词，而当它跟在噪音中的词之后时则被时间锁定到提示。对该正成分的分布式源分析揭示了两种时间条件之间源活动的不同模式。相关性的影响还产生了大约 400 ms (N400) 的事件相关电位调制，当它跟在噪音中的词之后时出现在提示呈现时，但在提示之前的噪音中不存在，这与关于其的发现一致对信号衰减的敏感性。探索性分析检查了基于参与者主观感知清晰度的数据子集，这揭示了左半球的后偏转，显示出相关性效应。我们根据对预测的研究以及反思性注意框架来讨论这些发现。相关性的影响还产生了大约 400 ms (N400) 的事件相关电位调制，当它跟在噪音中的词之后时出现在提示呈现时，但在提示之前的噪音中不存在，这与关于其的发现一致对信号衰减的敏感性。探索性分析检查了基于参与者主观感知清晰度的数据子集，这揭示了左半球的后偏转，显示出相关性效应。我们根据对预测的研究以及反思性注意框架来讨论这些发现。相关性的影响还产生了大约 400 ms (N400) 的事件相关电位调制，当它跟在噪音中的词之后时出现在提示呈现时，但在提示之前的噪音中不存在，这与关于其的发现一致对信号衰减的敏感性。探索性分析检查了基于参与者主观感知清晰度的数据子集，这揭示了左半球的后偏转，显示出相关性效应。我们根据对预测的研究以及反思性注意框架来讨论这些发现。与关于其对信号衰减的敏感性的研究结果一致。探索性分析检查了基于参与者主观感知清晰度的数据子集，这揭示了左半球的后偏转，显示出相关性效应。我们根据对预测的研究以及反思性注意框架来讨论这些发现。与关于其对信号衰减的敏感性的研究结果一致。探索性分析检查了基于参与者主观感知清晰度的数据子集，这揭示了左半球的后偏转，显示出相关性效应。我们根据对预测的研究以及反思性注意框架来讨论这些发现。