Increased Response-Time Variability Across Different Cognitive Tasks in Children With ADHD
Increased Response-Time Variability Across Different Cognitive Tasks in Children With ADHD
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DOI：
10.1177/1087054712439419
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发表时间：
2014-07-01
影响因子：
3
通讯作者：
Zuddas, Alessandro
中科院分区：
文献类型：
--
作者：
Adamo, Nicoletta;Di Martino, Adriana;Zuddas, Alessandro
目标：在一些但不是所有的研究中，反应时间（RT）波动低于0.2 Hz的增加被报告为ADHD的特征，这可能是由于方法上的差异。因此，我们在同一样本的ADHD儿童中对比了两种任务和两种分析方法。方法：52名ADHD儿童和49名发育正常的儿童完成了Eriksen Flanker任务和固定序列版本的持续注意力反应任务。RT波动与两个不同的频率分析进行了检查。结果：在这两项任务中，所有频率内的慢RT波动均与ADHD相关。两组的任务在0.07 Hz以上的频率上显著相关。所有频率的RT波动在ADHD儿童中最大，异常升高的遗漏。结论：我们观察到在两种不同的任务和方法中，ADHD儿童的RT波动显著增加，这支持了慢频率RT波动反映ADHD相关神经生理过程的假设。
Objective: Increased response-time (RT) fluctuations below 0.2 Hz have been reported as characteristic of ADHD in some but not all studies, possibly due to methodological differences. Accordingly, We contrasted two tasks and two analytical approaches in the same sample of children with ADHD. Method: Fifty-two children with ADHD and 49 typically developing children completed an Eriksen Flanker Task and a fixed-sequence version of the sustained attention to response task. RT fluctuations with two different frequency analyses were examined. Results: Robust ADHD-related increases of slow RT fluctuations within all frequencies were found in both tasks. Tasks were significantly correlated in both groups for frequencies above 0.07 Hz. RT fluctuations across all frequencies were greatest in children with ADHD with abnormally elevated omissions. Conclusion: We observed significantly increased fluctuations of RT in children with ADHD across two different tasks and methods supporting the hypothesis that slow frequency RT fluctuations reflect neurophysiological processes underlying ADHD.