Neural mechanisms of dynamic syntactic and semantic processing in Chinese garden-path sentence comprehension: An ERP study

In this study, the neural mechanisms of dynamic syntactic and semantic processing in Chinese garden-path sentence comprehension were investigated using electrophysiological and behavioral measures. Two groups of garden-path sentences were designed, with the ambiguity of multiple word categories in Group 1 and classifier-noun agreements in Group 2. Besides the ambiguous condition, there were also control and semantic violation conditions. Participants made plausibility judgment of each sentence. The ERPs elicited by the last three critical word regions in each sentence were examined continuously to uncover the time course of the revision process clearly. Relative to the control sentence, the ambiguous sentences of both groups elicited the smallest N400 before and on the disambiguating region, but the largest P600 at the disambiguation position, indicating that the sentences were misparsed and/or misinterpreted initially, and revised efficiently when the input cannot be integrated into the syntactic structure constructed. No significant N400 difference was observed between the ambiguous and the control condition on the disambiguating regions, indicating that semantic processing proceeded even no appropriate syntactic structures were built for the incomplete sentences. Therefore, without morphosyntactic constraints in Chinese, semantic processing is generally prior to the syntactic one, which will be revised only when semantic integration fails.