Neural correlates of familiarity and conceptual fluency are dissociable at encoding  

作　　者：Mingzhu Hou Chuanji Gao Jun Wu Chunyan Guo 

机构地区：[1]Beijing Key Laboratory of Learning and Cognition, Department of Psychology, Capital Normal University [2]Department of College English, Capital Normal University

出　　处：《Chinese Science Bulletin》2014年第28期3602-3609,共8页

基　　金：supported by the National Natural Science Foundation of China (31271078);Beijing Municipal Commission of Education Key Program of Science and Technology (KZ201410028034)

摘　　要：Familiarity and conceptual fluency belong to explicit and implicit memory respectively. Since familiarity and conceptual fluency co-occur at certain circumstances and share some similarities, it is difficult to distinguish them. By using ERPs, in present study, we sought to differentiate the Dm effects, the differential neural activities due to later memory performances, of familiarity and conceptual fluency at encoding. We used ancient pictographic characters as stimuli, which were categorized as high or low meaningfulness based on the subjective ratings. In Experiment 1, conceptual fluency was observed to be induced exclusively by the repetition of relative meaningful items. In Experiment 2, Dm effects of familiarity and conceptual fluency were observed, respectively. In addition, the distribution of conceptual fluency Dm effects was found to be more posterior than that of familiarity Dm effects. These findings provide the dissociation of familiarity and conceptual fluency at encoding and further support the distinction between explicit and implicit memory.Familiarity and conceptual fluency belong to explicit and implicit memory respectively. Since familiar- ity and conceptual fluency co-occur at certain circum- stances and share some similarities, it is difficult to distinguish them. By using ERPs, in present study, we sought to differentiate the Dm effects, the differential neural activities due to later memory performances, of familiarity and conceptual fluency at encoding. We used ancient pictographic characters as stimuli, which were categorized as high or low meaningfulness based on the subjective ratings. In Experiment 1, conceptual fluency was observed to be induced exclusively by the repetition of relative meaningful items. In Experiment 2, Dm effects of familiarity and conceptual fluency were observed, respec- tively. In addition, the distribution of conceptual fluency Dm effects was found to be more posterior than that of familiarity Dm effects. These findings provide the disso- ciation of familiarity and conceptual fluency at encoding and further support the distinction between explicit and implicit memory.

关 键 词：神经活动 流畅性 编码 分离 关联 内存性能 概念性 DM 

分 类 号：R338[医药卫生—人体生理学]