【摘要】 该研究以简单形状和颜色构成的客体为材料,采用延迟匹配范式,通过记录事件相关电位,以反映工作记忆表征与知觉输入间冲突的N270为指标,就视觉工作记忆中的客体存储机制进行了探讨。结果发现,无关维度特征变化与目标维度特征变化均可诱发N270。该结果表明,视觉工作记忆对客体目标特征进行存储时,无关特征亦自动得到选择加工,支持基于客体的存储说。更多还原

【Abstract】 At present,there are two theories on how visual information is represented in visual working memory (VWM).One proposes the object-based storage hypothesis, suggesting that the VWM can automatically store all the features of an object.The other one puts forward a selective-storage hypothesis,indicating that only relevant feature can be represented in VWM.In this paper,using delayed matching-to-sample paradigm, we adopted an ERPs experiment to investigate the issue by taking N270 as an index.The object was defined by color and shape,which could be pro- cessed in parallel.The data analyses showed that N270 was elicited when the relevant feature was changed,and could be also observed in irrelevant change condition.Therefore,the result suggested when relevant feature was selected,the irrelevant features from the same object would also be automatically selected,thus supporting the object-based storage hypothesis.更多还原