Institute for Language and Cognition, School of
Foreign Languages, Dalian University of Technology
关键词:
Chinese relative construction; N400; relatedness proportion; semantic prediction
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摘要:
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When a context of a strongly constrained sentence structure is
formed, N400 as the ERP component of the follow-up word of the structure
will be reduced in amplitude. Two accounts can explain this: a passive
activation account and a contextual-based prediction account. A dispute lies in
the extent of how each of these accounts influences the N400 element
reduction. This issue is addressed in the present paper in Chinese relative
construction context by formatting semantically associated Chinese relative
construction prime and word target pairs within an experimental context that
encouraged prediction. The proportion of related pairs was used to modulate
the predictive validity of the relative construction prime for the target while
holding constant semantic association. A semantic category probe detection
task was used to encourage subjects to process semantic meaning of these
experimental pairs without their preferences to the trial content of interest. A
larger N400 reduction to related targets was observed in the high-proportion
block of relatedness than under the low condition. The results support the
hypothesis that N400 effects emerge in the predictions of upcoming input. The
results suggest that predictability modulates N400 amplitude in a dominant
way in a constrained context like Chinese relative constructions.