Steelman-Allen Kelly S, McCarley Jason S, Mounts Jeffrey R W
University of Illinois at Urbana-Champaign, Urbana, Illinois, USA.
Psychon Bull Rev. 2009 Feb;16(1):110-5. doi: 10.3758/PBR.16.1.110.
Visual performance is compromised when attention is divided between objects that are near one another in the visual field. It has been postulated that this effect, termed localized attentional interference (LAI), reflects competition between visual-object representations for the control of cortical neural responses. To determine whether LAI arises during feedforward processing or during reentrant processing, the present study examined the influence of poststimulus pattern and four-dot masks on the strength of the effect. Experiment 1 found that pattern masks, which are believed to compromise feedforward processing, do not produce stronger LAI than do four-dot masks, which are believed to leave feedforward processing undisrupted. Experiment 2 found that LAI is weaker when reentrant processing is interrupted shortly after initiation than it is when reentrant processing is allowed to run to completion. The results suggest that LAI emerges from competition between objects during reentrant processing.
当注意力分散在视野中彼此靠近的物体之间时，视觉表现会受到影响。据推测，这种被称为局部注意力干扰（LAI）的效应反映了视觉对象表征之间为控制皮层神经反应而产生的竞争。为了确定LAI是在前馈处理过程中出现还是在折返处理过程中出现，本研究考察了刺激后图案和四点掩模对该效应强度的影响。实验1发现，据信会损害前馈处理的图案掩模，不会比据信不会干扰前馈处理的四点掩模产生更强的LAI。实验2发现，折返处理在开始后不久被中断时的LAI，比折返处理允许运行至完成时的LAI要弱。结果表明，LAI是在折返处理过程中物体之间的竞争中出现的。
