Departamento de Psicología Básica 1, Facultad de Psicología, UNED, Spain.
Cortex. 2011 Jun;47(6):706-14. doi: 10.1016/j.cortex.2010.05.007. Epub 2010 Jul 7.
We examined the effects of different grouping cues (item density, number and connectedness) on the ability of a patient with simultanagnosia (GK) to identify compound stimuli. In Experiment 1, the effects of density and connectedness on the recognition of global and local forms were examined. In Experiment 2, the spatial distance of local elements was manipulated by varying the size of the global forms and the number of local elements, to assess whether the distance between the local elements or their number determined the effects on global/local processing in disconnected patterns. The results showed that high item density and connectedness, each facilitates the grouping of local elements into global shapes, determined the explicit recognition of global stimuli in simultanagnosia. Moreover, in addition to any bias to attend to the local level, there was also evidence for attentional capture by stimuli at the global level. The data indicate that grouping processes still operate in simultanagnosia and can overcome biases to select at a local level. Any biases in selection can also be compounded by poor attentional disengagement.
我们研究了不同分组线索（项目密度、数量和连接性）对同时性失认症患者（GK）识别复合刺激的能力的影响。在实验 1 中，研究了密度和连接性对整体和局部形式识别的影响。在实验 2 中，通过改变全局形式的大小和局部元素的数量来操纵局部元素的空间距离，以评估局部元素之间的距离或其数量是否决定了在不连续模式下对全局/局部处理的影响。结果表明，高项目密度和连接性都有助于将局部元素组合成整体形状，从而确定同时性失认症中对整体刺激的明确识别。此外，除了任何关注局部水平的偏向外，还有证据表明全局水平的刺激也会引起注意力捕获。数据表明，分组过程在同时性失认症中仍然起作用，并且可以克服选择局部水平的偏向。任何选择偏向也可能因注意力难以脱离而加剧。
