机构地区: 广州大学教育学院
出 处: 《现代生物医学进展》 2012年第32期6376-6381,共6页
摘 要: 目的:研究类别学习过程中,基于类别相似性的不同时间限制下被试分类学习脑激活机制。方法:通过对15名被试采用事件相关电位技术(ERPs),使用2相似程度不同(高相似vs低相似)×3呈现时间不同(10ms vs 200ms vs 600ms)的多因素实验设计,探讨不同相似程度及刺激呈现时间不同下的类别学习脑机制。结果:类别高相似的脑激活机制更加复杂,激活的脑区更多;刺激呈现时间为10ms的时候被试的波形图与200ms和600ms类似,但是其潜伏期更短,决策速度更快;三种时间条件下都激活了N400,可能存在语义加工。结论:类别学习在视觉加工阶段就已经发生;类别学习过程并非全或无的竞争机制,而是内隐和外显综合加工的结果。 Objective: Categorization is very important cognitive skill. Different categories based on similarity of the time limit, we used ERPs to study the category learning of the brain activation mechanism trial. Methods: 15 participants under ERPswere used to research the neuromechanism of categorizationin different similarity and different time constraints using themulti-factor experimental design of different similarity 2(l-Iigh similarity vs Low similarity)× 3different present time(10ms vs 200ms vs 600ms). Results: The brain activation mechanism was more complex and more encephalic regions activated when the object of High-Similarity. When stimuli preventative time is 10ms, oscillograph trace was similar with 200ms and 600ms, but more short latency and faster decision-making. All condition are activated N 400 and indicate semantic processing in category learning. Conclusion: Category learning in the visual processing stage has already occurred. Category learning is not all or none of the competition, but implicit and explicit processing of the results of comprehensive.
领 域: [哲学宗教]