Center for Brain/Mind Medicine, Division of Cognitive and Behavioral Neurology, Department of Neurology, Brigham and Women's Hospital, Harvard Medical School, 221 Longwood Avenue, Boston, MA 02115, USA.
Biol Psychol. 2012 Feb;89(2):398-407. doi: 10.1016/j.biopsycho.2011.12.002. Epub 2011 Dec 15.
Numerous studies have demonstrated that selective attention to color is associated with a larger neural response under attend than ignore conditions, but have not addressed whether this difference reflects enhanced activity under attend or suppressed activity under ignore. In this study, a color-neutral condition was included, which presented stimuli physically identical to those under attend and ignore conditions, but in which color was not task relevant. Attention to color did not modulate the early sensory-evoked P1 and N1 components. Traditional ERP markers of early selection (the anterior Selection Positivity and posterior Selection Negativity) did not differ between the attend and neutral conditions, arguing against a mechanism of enhanced activity. However, there were markedly reduced responses under the ignore relative to the neutral condition, consistent with the view that early selection mechanisms reflect suppression of neural activity under the ignore condition.
许多研究表明，与忽略条件相比，对颜色的选择性注意会导致注意条件下的神经反应更大，但尚未解决这种差异是反映了注意条件下的活动增强还是忽略条件下的活动抑制。在这项研究中，包括了一种颜色中性条件，该条件呈现的刺激与注意和忽略条件下的刺激完全相同，但颜色与任务无关。对颜色的注意并没有调节早期感觉诱发的 P1 和 N1 成分。早期选择的传统 ERP 标记（前选择正波和后选择负波）在注意和中性条件之间没有差异，这表明不存在活动增强的机制。然而，与中性条件相比，忽略条件下的反应明显减少，这与早期选择机制反映了忽略条件下神经活动抑制的观点一致。
