Color, Context, and Cognitive Style: Variations in Color Knowledge Retrieval as a Function of Task and Subject Variables
Color, Context, and Cognitive Style: Variations in Color Knowledge Retrieval as a Function of Task and Subject Variables
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DOI：
10.1162/jocn.2011.21619
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发表时间：
2011-09-01
影响因子：
3.2
通讯作者：
Thompson-Schill, Sharon L.
中科院分区：
文献类型：
--
作者：
Hsu, Nina S.;Kraemer, David J. M.;Thompson-Schill, Sharon L.
语义记忆的感觉运动理论的神经影像学测试取决于在感知和检索对象或对象属性期间观察到的相似激活模式的程度。本研究的动机是假设，跨研究的一些表面上的差异反映了系统的灵活性，负责概念和感知处理的颜色。具体来说，我们测试的假设，颜色知识的检索可以同时受到上下文（一个任务变量）和认知风格（一个主题变量）的个体差异的影响。在实验1中，我们提供了功能磁共振成像证据的差异活动在颜色知识检索的受试者进行口头任务，在这种情况下，鼓励受试者检索更多或更少的详细信息命名的共同对象的颜色在一个封闭的实验设计。在左侧纺锤形中，我们发现在检索更多详细颜色知识与不太详细颜色知识时有更多活动。我们还评估了语言或视觉认知风格的偏好，发现左舌回的大脑活动与视觉认知风格的偏好显著相关。我们在实验2中复制了许多这些效果，其中刺激更快地呈现，以随机顺序，并在听觉模态。这说明的一些因素，可以影响颜色知识检索导致的结论是，测试的概念和感知重叠必须考虑这两个过程中的变化。
Neuroimaging tests of sensorimotor theories of semantic memory hinge on the extent to which similar activation patterns are observed during perception and retrieval of objects or object properties. The present study was motivated by the hypothesis that some of the seeming discrepancies across studies reflect flexibility in the systems responsible for conceptual and perceptual processing of color. Specifically, we test the hypothesis that retrieval of color knowledge can be influenced by both context (a task variable) and individual differences in cognitive style (a subject variable). In Experiment 1, we provide fMRI evidence for differential activity during color knowledge retrieval by having subjects perform a verbal task, in which context encouraged subjects to retrieve more-or less-detailed information about the colors of named common objects in a blocked experimental design. In the left fusiform, we found more activity during retrieval of more-versus less-detailed color knowledge. We also assessed preference for verbal or visual cognitive style, finding that brain activity in the left lingual gyrus significantly correlated with preference for a visual cognitive style. We replicated many of these effects in Experiment 2, in which stimuli were presented more quickly, in a random order, and in the auditory modality. This illustration of some of the factors that can influence color knowledge retrieval leads to the conclusion that tests of conceptual and perceptual overlap must consider variation in both of these processes.