Observer weighting of interaural delays in filtered impulses
Observer weighting of interaural delays in filtered impulses
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DOI：
10.3758/bf03206831
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发表时间：
1996-10-01
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影响因子：
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通讯作者：
Saberi, K
中科院分区：
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作者：
Saberi, K
在声音定位的发病优势进行了检查，通过估计观察员权重的耳间延迟的每一个点击的一列高频过滤点击。每次咔哒声的耳间延迟是一个正态偏差，在单间隔设计的每次试验中独立采样。在实验1中，观察员的权重，推导出列车n=2，4，8，或16点击作为interclick间隔（ICI=1.8，3.0，或12.0毫秒）的函数。对于小n和短ICI（1.8 msec），起始体重与剩余体重的比值高达10。随着ICI的增加，相对起始重量减少。对于大的it和所有的ICI，正在进行的列车比开始更重。随着ICI和n的增加，这种相对起始重量减小与组分之间重量的最佳分布一致。当ICI=12 msec和n=2时，权重分布的效率接近理想，而对于较短的ICI和较大的ns，权重分布的效率非常差。进一步的实验表明：（1）发作优势涉及频率通道内和频率通道间机制，（2）刺激配置（ICI、n、频率内容和时间间隙）以一种复杂的方式影响加权函数，无法用交叉相关分析或对侧抑制来解释（Lindemann，1986 a，1986 b）。
Onset dominance in sound localization was examined by estimating observer weighting of interaural delays for each click of a train of high-frequency filtered clicks. The interaural delay of each click was a normal deviate that was sampled independently on each trial of a single-interval design. In Experiment 1, observer weights were derived for trains of n=2, 4, 8, or 16 clicks as a function of interclick interval (ICI=1.8, 3.0, or 12.0 msec). For small n and short ICI (1.8 msec), the ratio of onset weight to remaining weights was as large as 10. As ICI increased, the relative onset weight was reduced. For large it and all ICIs, the ongoing train was weighted more heavily than the onset. This diminishing relative onset weight with increasing ICI and n is consistent with optimum distribution of weights among components. Efficiency of weight distribution is near ideal when ICI=12 msec and n=2 and very poor for shorter ICIs and larger ns. Further experiments showed that: (1) onset dominance involves both within- and between-frequertcy-channel mechanisms, and (2) the stimulus configuration (ICI, n, frequency content, and temporal gaps) affects weighting functions in a complex way not explained by cross-correlation analysis or contralateral inhibition (Lindemann, 1986a, 1986b).