摘要
采用事件相关功能性磁共振成像技术 (event relatedfMRI)以及在FOK(feeling of knowing)研究中常用的“线索回忆 FOK判断 再认测验”(Recall Judgment Recognition ,RJR)程序 ,以汉字词对为识记材料 ,研究了FOK判断中的大脑活动区域。根据FOK判断的正负以及其后的再认测验的对错 ,实验将FOK判断的项目分为四类 :PP项目 (正性FOK判断 ,正确再认 ) ,NN(负性FOK判断 ,错误再认 ) ,NP(负性FOK判断 ,正确再认 )以及PN(正性FOK判断 ,错误再认 )。脑成像的分析结果显示 :准确的FOK预测 (即PP与NN项目 )与不准确的FOK预测 (即NP与NP项目 )在脑活动上没有显著的差异。而进一步分析表明 ,这种“无差异”的现象可能是由于PP项目与NN项目激活了不同的脑活动模式所造成的。具体地讲 ,相对于NN项目而言 ,PP项目伴随有明显的左侧前额叶(BA 8区 )的活动。这一观察提示我们 :知道感 (PP)与不知道感 (NN)可能是由不同的脑神经网络所支持。
Neural correlates of feeling of knowing (FOK) were investigated by event related fMRI and unrelated word pairs in a standard Recall Judgment Recognition (RJR) procedure. According to performance in post scan criterion test, FOK trials were categorized as ”PP” (positive FOK, positive/”hits” recognition), ”NN” (negative FOK, negative/”misses” recognition), ”NP” (negative FOK, negative recognition), and ”PN” (positive FOK, negative recognition). Contrasts between accurate FOK predictions (PP, NN) and inaccurate ones (NP, PN) revealed no difference. Further analysis indicated PP and NN were different; combining them together might conceal differences. Specifically, PP was associated with left prefrontal activities in BA 8 or BA 47 relative to NN or NP respectively. This observation queried the conventional view that regarded PP and NN as the same kind of ”accurate FOK predictions”, and called for dissociations between feeling of knowing (PP) and feeling of not knowing (NN).
出处
《心理学报》
CSSCI
CSCD
北大核心
2004年第4期426-433,共8页
Acta Psychologica Sinica
基金
ThisworkwassupportedbytheNationalNaturalScienceFoundationofChina ( 3 0 2 70 464
3 0 3 2 5 0 2 6)
andbytheChineseAcademyofSciences(KSCX2 -SW -2 2 1)
