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我们采用不同组块数的汉字饲组作为刺激事件，研究了在短时记忆过程中４０Ｈｚ脑电事件相关电位（４０ＨｚＥＲＰｓ）的分维特性。通过短时记忆容量与４０ＨｚＥＲＰｓ分维特性的相关分析，发现在测试组块数在７附近时，４０ＨｚＥＲＰｓ分维数分形维数特性发生了突变，表现为左右半球分维数值相对大小的反转和同一半球内分维数的突降。这与心理学分析得到的汉字短时记忆容量在６、７个组块数附近的结论相吻合。
We used Chinese characters feeding groups with different numbers of chunks as stimulation events to study the fractal dimension of 40 Hz EEG-related potentials (40 HzERPs) during short-term memory. By analyzing the correlation between short-term memory capacity and 40 HzERPs fractal dimension, it is found that the fractal dimension of 40 HzERPs has a mutation when the number of test blocks is around 7, which shows the reversal of the relative size of the left and right hemispherical fractal dimension values The same hemisphere within the fractal dimension of the sudden drop. This is consistent with the conclusion that the short-term memory capacity of Chinese characters obtained by psychoanalysis is around 6 and 7 blocks.