Reentrant processing mediates object substitution masking: comment on Põder (2013)
Reentrant processing mediates object substitution masking: comment on Põder (2013)
复制标题
可重入处理介导对象替换屏蔽：对 Põder (2013) 的评论
作者：
V. Lollo
当目标刺激和周围的掩膜短暂地一起显示时，对象替换掩蔽(OSM)就会发生，然后单独使用掩膜继续显示。当刺激共同终止时，目标识别是准确的，但随着拖尾掩模持续时间的增加，目标识别会逐渐受损。在可重入的账户中，OSM被认为是由双向通路连接的大脑区域之间的迭代交换产生的。在另一种账户中，OSM完全以前馈过程为基础进行解释，而不求助于再入。在这里，我展示了前馈描述与现有的现象学、行为学、脑成像和电生理学证据相抵触。此外，当注意力发现退化的目标时，掩蔽发生的前馈假设被证明完全是临时的。相比之下，证据与OSM的重入处理描述一致。
Object-substitution masking (OSM) occurs when a target stimulus and a surrounding mask are displayed briefly together, and the display then continues with the mask alone. Target identification is accurate when the stimuli co-terminate but is progressively impaired as the duration of the trailing mask is increased. In reentrant accounts, OSM is said to arise from iterative exchanges between brain regions connected by two-way pathways. In an alternative account, OSM is explained on the basis of exclusively feed-forward processes, without recourse to reentry. Here I show that the feed-forward account runs afoul of the extant phenomenological, behavioral, brain-imaging, and electrophysiological evidence. Further, the feed-forward assumption that masking occurs when attention finds a degraded target is shown to be entirely ad hoc. In contrast, the evidence is uniformly consistent with a reentrant-processing account of OSM.