中文摘要：

将ERP技术和半视野技术相结合，采用词汇判断任务，对汉语名词、动词和动名兼类词在左脑和右脑中的加工机制进行了考察。实验结果显示，名词和动词的N400仅在左视野/右脑存在差异，名词和动词的N400在左视野／右脑和右视野／左脑中都比偏（动）和偏（名）更负。不同词类的LPC在右视野／左脑中没有显著差异；偏（名）和偏（动）的LPC在左视野／右脑中比名词和动词更正。实验结果表明，在没有语境条件下，汉语名词和动词的差异主要在具体性上，动名兼类词体现出不同于名词、动词的加工机制。

英文摘要：

The two hemispheres of human brain complement each other for most fanctions, including language. A number of studies have investiguted the hemispheric asymmetry in the language processing, especially on nouns and verbs. However, the results obtained so far were mainly from studies on languages with rich inflectional morphology. It is unclear whether the differences in the processing of nouns and verbs are due to semantic- conceptual properties or morpho-syntactic properties associated with the two word classes. It is reasonable to examine the word class effect in a language with simple inflectional morphology, such as Chinese. Furthermore, the techniques applied in previous researches were low in temporal resolution that might limit the findings. Event-related potentials （ERPs） can measure the processing activities in the human brain with millisecond accuracy. Thus, the current study, by combining ERP and VF techniques, aims to explore the hemispheric lateralization in the semantic processing of Chinese noun, verb and verb-noun ambiguous words in the left hemisphere （LH） and the right hemisphere （RH）. The experiment contained five sets of stimuli： disyllabic unambiguous nouns （UN）, unambiguous verbs （UV）, verb-biased （V-VN）, noun-biased （N-VN） verb-noun ambiguous words and non-words. There were 80 stimuli for each set of real word and 320 non-words. The disyllabic compounds were vertically arranged in the left visual field （LVF） and right visual field （RVF） to ensure that each character in the compounds was equally distant from the fixation. 17 native Chinese speakers were instructed to judge whether the stimulus, presented to the LVF or RVF quickly and randomly, was a real word or not. The repeated measures of ANOVAs on the mean amplitude with factors of word classes, hemisphere and electrode site revealed significant main effect of word class in intervals of 350-500ms （N400） and 500-650ms （LPC）. In the RVF/LH, the amplitudes of N400 were greater for UN and UV