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Hilbert-Huang versus Morlet wavelet transformation on mismatch negativity of children in uninterrupted sound paradigm

机译:Hilbert-Huang与Morlet小波变换对不间断声音范式中儿童失配负性的影响

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摘要

BackgroundCompared to the waveform or spectrum analysis of event-related potentials (ERPs), time-frequency representation (TFR) has the advantage of revealing the ERPs time and frequency domain information simultaneously. As the human brain could be modeled as a complicated nonlinear system, it is interesting from the view of psychological knowledge to study the performance of the nonlinear and linear time-frequency representation methods for ERP research. In this study Hilbert-Huang transformation (HHT) and Morlet wavelet transformation (MWT) were performed on mismatch negativity (MMN) of children. Participants were 102 children aged 8–16 years. MMN was elicited in a passive oddball paradigm with duration deviants. The stimuli consisted of an uninterrupted sound including two alternating 100 ms tones (600 and 800 Hz) with infrequent 50 ms or 30 ms 600 Hz deviant tones. In theory larger deviant should elicit larger MMN. This theoretical expectation is used as a criterion to test two TFR methods in this study. For statistical analysis MMN support to absence ratio (SAR) could be utilized to qualify TFR of MMN.
机译:背景技术与事件相关电位(ERP)的波形或频谱分析相比,时频表示(TFR)的优势在于可以同时显示ERPs的时域和频域信息。由于可以将人脑建模为一个复杂的非线性系统,因此从心理学知识的角度出发,研究非线性和线性时频表示方法在ERP研究中的性能非常有趣。在这项研究中,对儿童的失配负性(MMN)进行了希尔伯特-黄(HHT)变换和莫雷特小波变换(MWT)。参加者为102名8-16岁的儿童。 MMN是在具有持续时间偏差的被动奇数球范式中引发的。刺激由不间断的声音组成,包括两个交替的100 ms音调(600和800 Hz)和不常见的50 ms或30 ms 600 Hz偏差音。从理论上讲,更大的偏差会引发更大的MMN。该理论预期用作测试本研究中两种TFR方法的标准。为了进行统计分析,可以使用MMN支持比(SAR)来限定MMN的TFR。

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