Wu Qiong, Lo Voi Jonathan T H, Lee Thomas Y, Mackie Melissa-Ann, Wu Yanhong, Fan Jin
Department of Psychology, Peking University , Beijing, China.
The Graduate Center, City University of New York , New York, NY, USA ; Department of Psychology, Queens College, City University of New York , Queens, NY, USA.
Front Psychol. 2015 Aug 11;6:1110. doi: 10.3389/fpsyg.2015.01110. eCollection 2015.
Executive control of attention refers to processes that detect and resolve conflict among competing thoughts and actions. Despite the high-level nature of this faculty, the role of awareness in executive control of attention is not well understood. In this study, we used interocular suppression to mask the flankers in an arrow flanker task, in which the flankers and the target arrow were presented simultaneously in order to elicit executive control of attention. Participants were unable to detect the flanker arrows or to reliably identify their direction when masked. There was a typical conflict effect (prolonged reaction time and increased error rate under flanker-target incongruent condition compared to congruent condition) when the flanker arrows were unmasked, while the conflict effect was absent when the flanker arrows were masked with interocular suppression. These results suggest that blocking awareness of competing stimuli with interocular suppression prevents the involvement of executive control of attention.
注意力的执行控制是指检测并解决相互竞争的思想和行动之间冲突的过程。尽管这一能力具有高级性质,但意识在注意力执行控制中的作用尚未得到充分理解。在本研究中,我们利用双眼抑制在箭头侧翼任务中掩盖侧翼刺激,在该任务中,侧翼刺激和目标箭头同时呈现,以引发注意力的执行控制。当侧翼刺激被掩盖时,参与者无法检测到侧翼箭头,也无法可靠地识别其方向。当侧翼箭头未被掩盖时,会出现典型的冲突效应(与一致条件相比,在侧翼-目标不一致条件下反应时间延长且错误率增加),而当侧翼箭头被双眼抑制掩盖时,冲突效应则不存在。这些结果表明,通过双眼抑制阻断对竞争刺激的意识可防止注意力执行控制的参与。