Paquette C, Peretz I
Groupe de Recherche en Neuropsychologie Expérimentale, Université de Montréal.
Cortex. 1997 Dec;33(4):689-96. doi: 10.1016/s0010-9452(08)70726-3.
Normal subjects were presented with dichotic pairs of sounds differing in pitch-timbre combination. Their task was to detect a fixed target sound that occurred randomly but equally often in the right and the left ear in two-thirds of the trials. Half the subjects performed this task with sounds produced by familiar natural instruments (violin, flute, guitar and drum), and the other subjects performed the same task but with the sounds played backwards, hence being less recognizable. Subjects were quicker and more accurate in discriminating forwards than backwards played sounds, hence exhibiting sensitivity to familiarity with musical instrument sounds. Recourse to this knowledge was, however, not associated to a shift in laterality. For both familiar and unfamiliar sounds, a robust left-ear advantage (LEA) was observed.
正常受试者被给予了音高-音色组合不同的双耳声音对。他们的任务是在三分之二的试验中检测一个固定的目标声音，该声音在右耳和左耳随机出现，但出现的频率相同。一半的受试者用熟悉的自然乐器（小提琴、长笛、吉他和鼓）发出的声音执行此任务，另一半受试者执行相同任务，但声音是倒放的，因此辨识度较低。受试者辨别正向播放的声音比反向播放的声音更快、更准确，因此表现出对乐器声音熟悉度的敏感性。然而，利用这一知识与侧向性的变化无关。对于熟悉和不熟悉的声音，都观察到了明显的左耳优势（LEA）。
