Bergelson Elika, Idsardi William J
Department of Linguistics, University of Maryland, Maryland, USA.
Neuroreport. 2009 Feb 18;20(3):239-44. doi: 10.1097/wnr.0b013e32831ddebf.
Our findings provide magnetoencephalographic evidence that the mismatch-negativity response to two-note chords (dyads) is modulated by a combination of abstract cognitive differences and lower-level differences in the auditory signal. Participants were presented with series of simple-ratio sinusoidal dyads (perfect fourths and perfect fifths) in which the difference between the standard and deviant dyad exhibited an interval change, a shift in pitch space, or both. In addition, the standard-deviant pair of dyads either shared one note or both notes were changed. Only the condition that featured both abstract changes (interval change and pitch-space shift) and two novel notes showed a significantly larger magnetoencephalographic mismatch-negativity response than the other conditions in the right hemisphere. Implications for music and language processing are discussed.
我们的研究结果提供了脑磁图证据，表明对双音和弦（二元组）的失配负波反应受到抽象认知差异和听觉信号中较低层次差异的组合调节。向参与者呈现一系列简单比例的正弦二元组（纯四度和纯五度），其中标准二元组和偏差二元组之间的差异表现为音程变化、音高空间移位或两者皆有。此外，二元组的标准 - 偏差对要么共享一个音符，要么两个音符都改变。只有同时具有抽象变化（音程变化和音高空间移位）和两个新音符的条件在右半球显示出比其他条件明显更大的脑磁图失配负波反应。文中讨论了对音乐和语言处理的影响。
