Multiple looks in speech sound discrimination in adults.
Multiple looks in speech sound discrimination in adults.
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DOI：
10.1044/1092-4388(2005/064
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发表时间：
2005-08
期刊：
影响因子：
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通讯作者：
R. Holt;A. Carney
中科院分区：
文献类型：
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作者：
R. Holt;A. Carney
N. F. Viemeister和G. H.韦克菲尔德（1991）的多视假说是心理声学文献中的一种理论方法，有望弥合言语感知研究结果与心理声学研究结果之间的差距。这个假设解释了感官检测数据，并预测如果刺激的“看”是独立的，并且信息被最佳地组合，则相对于1个脉冲，2个脉冲的灵敏度应该增加。具体来说，2个脉冲的d'（灵敏度的无偏置测量）应该大于1个脉冲的d'。一种以多种呈现呈现刺激的言语辨别范例是改变/不变程序。在变化试验中，标准刺激和比较刺激不同;在无变化试验中，它们是相同的。听力正常的成年人进行了测试，使用的变化/无变化的程序与3个辅音-元音最小对的组合，1，2，和4个重复的标准和比较刺激在不同的信噪比。如果多个查找扩展到此过程，则性能应该随着重复次数的增加而增加。性能增加了更多的演讲对比测试。多外观假设预测性能更好地在低重复数时，性能接近d'值为1.0比在较高的重复数和较高的性能水平。
N. F. Viemeister and G. H. Wakefield's (1991) multiple looks hypothesis is a theoretical approach from the psychoacoustic literature that has promise for bridging the gap between results from speech perception research and results from psychoacoustic research. This hypothesis accounts for sensory detection data and predicts that if the "looks" at a stimulus are independent and information is combined optimally, sensitivity should increase for 2 pulses relative to 1 pulse. Specifically, d' (a bias-free measure of sensitivity) for 2 pulses should be larger than d' for 1 pulse. One speech discrimination paradigm that presents stimuli with multiple presentations is the change/no-change procedure. On a change trial, the standard and comparison stimuli differ; on a no-change trial, they are the same. Normal-hearing adults were tested using the change/no-change procedure with 3 consonant-vowel minimal pairs in combinations of 1, 2, and 4 repetitions of standard and comparison stimuli at various signal-to-noise ratios. If multiple looks extend to this procedure, performance should increase with higher repetition numbers. Performance increased with more presentations of the speech contrasts tested. The multiple looks hypothesis predicted performance better at low repetition numbers when performance was near d' values of 1.0 than at higher repetition numbers and higher performance levels.