Peretz I, Morais J
Université de Montréal, Canada.
Neuropsychologia. 1987;25(4):645-52. doi: 10.1016/0028-3932(87)90055-8.
Two groups of non-musicians were required to classify pairs of melodies as "same" or "different". The experimental group was instructed to respond as fast as possible, while the control group did not receive such a speed requirement. Contrary to the control subjects, the experimental subjects exhibited a right-ear advantage in accuracy for "different" responses. Thus, time pressure was instrumental in inducing subjects to rely mainly on left-hemisphere processing. The fact that "different" responses were both faster than "same" ones and quicker than melody offset indicates the use of a self-terminating search process. The features searched for were, in all likelihood, local. Indeed, contrary to control subjects, experimental subjects performed equally well with (1) melodies differing in both contour and local pitches and with (2) melodies differing in local pitches only.
两组非音乐家被要求将旋律对分类为“相同”或“不同”。实验组被指示要尽可能快地做出反应，而对照组则没有收到这样的速度要求。与对照组受试者相反，实验组受试者在对“不同”反应的准确性上表现出右耳优势。因此，时间压力有助于促使受试者主要依赖左半球处理。“不同”反应比“相同”反应更快且比旋律结束更快这一事实表明使用了自我终止搜索过程。所搜索的特征很可能是局部的。事实上，与对照组受试者相反，实验组受试者在以下两种情况下表现同样出色：（1）轮廓和局部音高都不同的旋律，以及（2）仅局部音高不同的旋律。
