Riddoch M Jane, Humphreys Glyn W, Edwards Sarah, Baker Tracy, Willson Katherine
Behavioural Brain Sciences Centre, School of Psychology, University of Birmingham, Birmingham B15 2TT, UK.
Nat Neurosci. 2003 Jan;6(1):82-9. doi: 10.1038/nn984.
Previous studies have shown that selection for perceptual report is often limited to one object at a time, with elements being selected together if they belong to part of the same perceptual group. Here we used the neuropsychological phenomenon of extinction in human patients with parietal lesions to show that selection is influenced also by action relations between objects. Performance was better for objects that were positioned spatially so that they could be used together, relative to objects that were positioned inappropriately for their combined use. The action relation was critical, as performance for pictures did not improve if the items were only verbally associated. We found the opposite result with words. Effects of action relations emerged even on trials where only one object could be reported, showing implicit coding of 'action' units for selection. The effects of verbal associations may instead reflect priming between lexical entries.
先前的研究表明，感知报告的选择通常一次仅限于一个对象，如果元素属于同一感知组的一部分，则它们会被一起选择。在这里，我们利用患有顶叶病变的人类患者的消退这一神经心理学现象来表明，选择也会受到对象之间动作关系的影响。相对于那些因组合使用而摆放位置不当的对象，在空间上摆放成可一起使用的对象的表现更好。动作关系至关重要，因为如果这些项目只是在语言上相关联，图片的表现并不会改善。我们用单词得到了相反的结果。即使在只能报告一个对象的试验中，动作关系的影响也会出现，这表明存在用于选择的“动作”单元的隐式编码。语言关联的影响可能反而反映了词汇条目之间的启动效应。
