Han S, Chen L
Beijing Laboratory of Cognitive Science and Vision Laboratory, University of Science and Technology of China, China.
Sci China C Life Sci. 1996 Apr;39(2):179-88.
The different processing of global and local properties of compound visual stimuli was studied with event-related brain potentials (ERPs) in the present experiment. It was found that, compared with the identification of global properties, the discrimination of local properties elicited longer RTs, lower accuracies, increased amplitudes of PI, decreased amplitudes of N1, and longer latencies of N2 and P3. The conflict of global and local properties increased the amplitudes of P2, decreased the amplitudes of P3, and prolonged latencies of N2 and P3. These results indicated that the advantage of global processing occurs at an early perceptual stage, and the attentional mechanisms for global and local processing may be different.
在本实验中，通过事件相关脑电位（ERP）研究了复合视觉刺激的全局和局部属性的不同加工过程。结果发现，与全局属性识别相比，局部属性辨别引发更长的反应时、更低的准确率、PI波幅增加、N1波幅降低以及N2和P3潜伏期延长。全局和局部属性的冲突增加了P2波幅，降低了P3波幅，并延长了N2和P3的潜伏期。这些结果表明，全局加工的优势出现在早期感知阶段，并且全局和局部加工的注意机制可能不同。
