Psychological Development and Education ›› 2011, Vol. 27 ›› Issue (2): 164-173.

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Chinese Language Learning Disabilities in the ERP Study Memory Encoding

WANG En-guo1, SHEN De-li2, LV Yong2, HU Wei2, LI Yong-xin1, CHEN Hai-xia1   

  1. 1. Institute of Psychology and Behavior, Henan University, Kaifeng 475004;
    2. Academy of Psychology and Behavior, Tianjin normal university, Tianjin 300074
  • Online:2011-03-15 Published:2011-03-15

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Abstract: The present research used the ERP paradigm of "learning-recognition"to investigate the brain mechanism during encoding process of keeping character of children who have difficulties in learning Chinese.The results indicated that:(1) for all participants,there was a significant subsequent memory effect between 300ms and 700ms of the encoding process;(2) for the occipital,parietal and central areas,the Dm effect was distributed between 400ms and 700ms during encoding phase,and the wave amplitude of correct recognition was significantly greater than that of false recognition;(3) during extraction stage,between 400ms and 500ms there was a significant old/new effect of occipital region and parietal areas;between 500ms and 700ms there was a significant old/new effect of parietal and central areas,and especially in the central area,the wave amplitude of old character reorganization was larger than the new Chinese characters correct recognition;(4) For the two kinds of processing conditions of Chinese learning disabilities group and control group,there was a significant difference on Dm effect in time and space;(5) Before the onset of the Dm effect,the P2 latency of learning difficulties group was significantly later than that of the control group.We also found that the differences between N2 and LPC of different ability groups were very similar with the Dm effect,the control group was more positive relative than the Chinese learning disabilities group;for the Dm effect is more different,the separation of different ability groups was significantly greater and last longer than that of Dm effect,and till 1000ms later,the time of separation was more longer than that of Dm effect.The control group had a more corrective later positive component.There were differences in the degree of processing between the learning disabilities group and the control group,so that the memory trace of the code project showed different characteristics.

Key words: Chinese character, Dm effect, old/new effect, language learning disabilities

CLC Number: 

  • G442
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