白噪音下注意缺损/多动障碍儿童适度大脑唤醒模型的ERP分析

ERP analysis of MBA model in children with ADHD exposed to white noise

目的:为了探究多动症适度大脑唤醒模型的心理机制是随机共振现象还是屏蔽效应。方法:本研究通过对比11名注意缺损/多动障碍儿童和15名正常儿童在不同白噪音响度下视觉三刺激Oddball任务中事件相关电位P300家族的变化。结果:实验发现P3b的潜伏期与白噪音响度成U型关系[F(2,48)=3.40,P=0.042],但P3a在白噪音的变化下不明显。结论:大脑唤醒对个体目标刺激的认知加工的影响符合随机共振的规律,白噪音并没有对新异刺激产生屏蔽作用。

Objective:To explore whether the psychological mechanism of moderate cerebral arousal model in ADHD is stochastic resonance or masking effect.Methods:In this study, 11 children with ADHD and 15 normal children were compared with the changes of the event-related potential P300 family during the visual tri-stimulus Oddball task under different white noise loudness.Results:It was found that there was a U-shaped relationship between the latency of P3 b and the loudness of white noise [F(2,48)=3.40,P<0.05],but the change of P3 a was not obvious under the change of white noise.Conclusion:The effect of brain arousal on the cognitive processing of individual target stimuli conforms to the law of stochastic resonance, and white noise has no masking effect on novel stimuli.