Key Laboratory of Cognition and Personality of Ministry of Education, Southwest University, 400715, China.
Brain Res. 2010 Jun 14;1337:64-73. doi: 10.1016/j.brainres.2010.04.023. Epub 2010 Apr 18.
The temporal course of the human brain dealing with flexible categorization was analyzed by using an event-related potential (ERP) technique in an animal/non-animal categorization task in two parallel experiments. Participants shown animal, person, mixed and non-animal images were asked if they saw 'animals' after being instructed to exclude humans in the category of 'animals' in Experiment 1, while they were told to define humans as animals in Experiment 2. The ERP data analysis showed that targets elicited larger P150 amplitudes than non-targets, which may reflect early perceptual detection and selection. Images including humans (person and mixed images) elicited larger anterior N2 amplitudes than animal images, regardless of the polysemy of the animal category, which may reflect an extra load on attention and monitoring processes in flexible categorization. Compared to non-targets, targets elicited larger P3 amplitudes, which may be associated with the categorical decision process.
采用事件相关电位（ERP）技术，在两个平行实验中，通过动物/非动物分类任务，分析人类大脑处理灵活分类的时间进程。在实验 1 中，参与者被要求在“动物”类别中排除人类，然后观看动物、人、混合和非动物的图片，并被询问是否看到“动物”；在实验 2 中，参与者被要求将人类定义为动物。ERP 数据分析表明，目标引发的 P150 振幅大于非目标，这可能反映了早期的感知检测和选择。包括人类（人和混合图像）的图像引发的前 N2 振幅大于动物图像，无论动物类别是否存在多义性，这可能反映了在灵活分类中注意力和监控过程的额外负担。与非目标相比，目标引发的 P3 振幅更大，这可能与类别决策过程有关。
