Abstract: An experiment was conducted to examine the difference between noun and verb words using ERP measurements and lexical decision task. Results showed that there was significant interaction between word class and word-concreteness between 200~300、300~400ms in lateral sites. Concrete nouns were associated with a more negative ERP than concrete verbs in the two hemispheres. Furthermore, there was significant interaction between word class and electrode site between 300~400ms. ERP differences between nouns and verbs were primarily over frontal lobe and temporal lobe. Our results partly supported neurobiological theory of language representation

Key words: nouns, verbs, ERP, neurobiological theory of language representation