Novelty and conflict in the categorization of complex stimuli
Novelty and conflict in the categorization of complex stimuli
复制标题
DOI：
10.1111/j.1469-8986.2007.00628.x
复制
发表时间：
2008-05-01
期刊：
影响因子：
3.7
通讯作者：
Rose, Scott A.
中科院分区：
文献类型：
--
作者：
Folstein, Jonathan R.;Van Petten, Cyma;Rose, Scott A.
我们操纵分类典型性和存在冲突的信息作为参与者分类多功能的人造动物。在实验1中，规则无关的功能与特定的类别在训练过程中。在测试阶段，参与者应用一维规则的刺激与规则无关的功能，类别一致，类别不一致，或新的。类别不一致和新功能延迟RT和P3潜伏期，但对N2没有影响。实验2使用了一个二维的规则来创建规则相关的功能之间的冲突。冲突导致RT延长和更大幅度的前额叶积极成分，但没有影响N2。具有新特征的刺激确实比具有频繁特征的刺激引起更大的N2。这些结果表明，N2的敏感性冲突的信息，同时确认其敏感性出席视觉新奇的一般性的限制。
We manipulated categorical typicality and the presence of conflicting information as participants categorized multifeatured artificial animals. In Experiment 1, rule-irrelevant features were correlated with particular categories during training. In the test phase, participants applied a one-dimensional rule to stimuli with rule-irrelevant features that were category-congruent, category-incongruent, or novel. Category-incongruent and novel features delayed RT and P3 latency, but had no effect on the N2. Experiment 2 used a two-dimensional rule to create conflict between rule-relevant features. Conflict resulted in prolonged RTs and larger amplitudes of a prefrontal positive component, but had no impact on the N2. Stimuli with novel features did elicit a larger N2 than those with frequent features. These results suggest limitations on the generality of the N2's sensitivity to conflicting information while confirming its sensitivity to attended visual novelty.