Brock University, St. Catharines, Ontario, Canada.
Brain Cogn. 2012 Apr;78(3):218-29. doi: 10.1016/j.bandc.2011.12.010. Epub 2012 Jan 24.
Accuracy for a second target (T2) is reduced when it is presented within 500 ms of a first target (T1) in a rapid serial visual presentation (RSVP) - an attentional blink (AB). There are reliable individual differences in the magnitude of the AB. Recent evidence has shown that the attentional approach that an individual typically adopts during a task or in anticipation of a task, as indicated by various measures, predicts individual differences in the AB deficit. It has yet to be observed whether indices of attentional approach when not engaged in a goal-directed task are also relevant to individual differences in the AB. The current studies investigated individual differences in the AB by examining their relationship with attention at rest using quantitative measures of EEG. Greater levels of alpha at rest were associated with larger AB magnitudes, where greater levels of beta at rest were associated with smaller AB magnitudes. Furthermore, individuals with more beta than alpha demonstrated a smaller AB effect than individuals with more alpha than beta. Our results suggest that greater attentional engagement at rest, when not engaged in a goal-directed task, is associated with smaller AB magnitudes.
当在快速序列视觉呈现 (RSVP) 中在第一个目标 (T1) 之后 500 毫秒内呈现第二个目标 (T2) 时，其准确性会降低-这是注意力眨眼 (AB)。AB 的幅度存在可靠的个体差异。最近的证据表明，个体在任务期间或在任务预期中通常采用的注意力方法，如各种测量指标所示，预测了 AB 缺陷的个体差异。目前还没有观察到当不参与目标导向任务时的注意力方法的指标是否也与 AB 的个体差异相关。本研究通过使用 EEG 的定量测量来检查 AB 与休息时注意力的关系，从而研究了 AB 的个体差异。静息时较高的阿尔法水平与较大的 AB 幅度相关，而静息时较高的贝塔水平与较小的 AB 幅度相关。此外，β水平高于α水平的个体比α水平高于β水平的个体表现出更小的 AB 效应。我们的研究结果表明，在不参与目标导向任务时，静息时的注意力投入越大，AB 的幅度就越小。
