Prosser S, Peronio M
Clinica Otorinolaringoiatrica, Università di Ferrara.
Acta Otorhinolaryngol Ital. 1995 Feb;15(1):2-8.
A group of normally hearing subjects were exposed to tonal pattern in order to ascertain the influence that temporal characteristics of the stimulation may exert on short-term memory of pure tones. Four tones with different frequencies were used as stimuli (500 ms duration, 500 ms off) followed at intervals of 1 and 7 seconds by a probe tone. The subjects' task was to decide whether the sequence included the probe tone or not. The effects of the different duration of the four target tones, which, with regard to the total duration of the tones of the sequence were 12.5%, 25%, 37.5% and 50% respectively, were studied. The decrease in recognition performance relative to to the sequence/probe interval and to the ordinal position of the target, appeared to be governed by the proportionality of the duration of the target-tones. The ordinal position of the targets proved to be the factor which most influenced recognition performance. On the basis of these data, it may be hypothesized that a mechanism of attention, activated by the temporal characteristics of the tones in the sequence, improves the ability to store, recall and recognize target elements in multi-tone sequences.
一组听力正常的受试者被暴露于音调模式下，以确定刺激的时间特征可能对纯音短期记忆产生的影响。使用四个不同频率的音调作为刺激（持续500毫秒，间隔500毫秒），之后分别在间隔1秒和7秒时出现一个探测音。受试者的任务是判断序列中是否包含探测音。研究了四个目标音调不同持续时间的影响，就序列音调的总持续时间而言，四个目标音调的持续时间分别为12.5%、25%、37.5%和50%。相对于序列/探测音间隔以及目标的顺序位置，识别性能的下降似乎受目标音调持续时间比例的支配。事实证明，目标的顺序位置是对识别性能影响最大的因素。基于这些数据，可以假设由序列中音调的时间特征激活的注意力机制，提高了在多音调序列中存储、回忆和识别目标元素的能力。
