Gumenyuk Valentina, Korzyukov Oleg, Alho Kimmo, Winkler István, Paavilainen Petri, Näätänen Risto
Cognitive Brain Research Unit, Department of Psychology, University of Helsinki, Helsinki, Finland.
Neuroreport. 2003 Aug 6;14(11):1411-5. doi: 10.1097/00001756-200308060-00001.
This study investigated the preattentive processing of abstract acoustic regularities in children aged 8-14 years. Event-related brain potentials (ERPs) were elicited by frequent (standard) pairs ascending in pitch (the second tone having a higher frequency than the first tone) and by infrequent (deviant) pairs descending in pitch. In the easy condition, the second tone of the pair was always one step higher (standard) or lower (deviant) than the first tone, while in the hard condition, the second tone was randomly 1-10 steps higher or lower than the first tone. In the easy condition we found the mismatch negativity (MMN) and a subsequent positive P3a-like deflection. In the hard condition, the amplitude of MMN was lower over frontal sites than in the easy condition, while the temporal component of MMN was not impaired by complexity of abstract regularities. These results suggest that the complexity of the auditory stimulation affects preattentive auditory change detection in children.
本研究调查了8至14岁儿童对抽象声学规律的前注意加工。通过音高上升的频繁（标准）对（第二个音的频率高于第一个音）和音高下降的不频繁（偏差）对诱发事件相关脑电位（ERP）。在简单条件下，对中的第二个音总是比第一个音高一个音阶（标准）或低一个音阶（偏差），而在困难条件下，第二个音比第一个音随机高或低1至10个音阶。在简单条件下，我们发现了失配负波（MMN）和随后类似P3a的正向偏转。在困难条件下，额叶部位MMN的波幅低于简单条件，而MMN的颞叶成分不受抽象规律复杂性的影响。这些结果表明，听觉刺激的复杂性会影响儿童的前注意听觉变化检测。
