Alain C, Achim A, Richer F
Département de Psychologie, Université du Québec à Montréal, Canada.
Psychophysiology. 1993 Nov;30(6):572-80. doi: 10.1111/j.1469-8986.1993.tb02083.x.
Two experiments examined the effect of the perceptual context established through tonal grouping on neuroelectric responses during selective listening. Subjects monitored one of the extreme pitches in four-pitch tone sequences and detected rare longer tones of the designated pitch. In the first study, tonal grouping was manipulated by changing the tonal separation between the extreme pitches and their nearest neighbor, keeping the extreme pitches constant. Grouping increased the negativity of the attended-unattended difference potential. A second study examined the effect of grouping on the attention-related negativity when it opposed the effect of physical similarity. The proximity of extreme pitches varied, keeping the middle pitches constant. The effect of grouping on event-related potentials (ERPs) for the middle pitches was varied according to the tone being attended. ERPs for the middle tone adjacent to the attended tone became more negative with grouping, whereas ERPs for the distant middle tone became less negative with grouping. These effects suggest that the attention-related negativity is sensitive to contextual information.
两项实验研究了通过音调分组建立的感知情境对选择性聆听期间神经电反应的影响。受试者监测四个音调序列中的一个极端音调，并检测指定音调的罕见较长音调。在第一项研究中，通过改变极端音调与其最邻近音调之间的音调间隔来操纵音调分组，同时保持极端音调不变。分组增加了被关注 - 未被关注差异电位的负性。第二项研究考察了分组对注意力相关负性的影响，此时分组与物理相似性的影响相反。极端音调的接近程度不同，同时保持中间音调不变。分组对中间音调的事件相关电位（ERP）的影响根据被关注的音调而变化。与被关注音调相邻的中间音调的ERP随着分组变得更负，而距离较远的中间音调的ERP随着分组变得不那么负。这些效应表明注意力相关负性对情境信息敏感。
