Streeter L A, Nigro G N
J Acoust Soc Am. 1979 Jun;65(6):1533-41. doi: 10.1121/1.382917.
In VCV nonsense forms (such as /epsilondepsilon/, while both the CV transition and the VC transition are perceptible in isolation, the CV transition dominates identification of the stop consonant. Thus, the question arises, what role, if any, do VC transitions play in word perception? Stimuli were two-syllable English words in which the medial consonant was either a stop or a fricative (e.g., "feeding" and "gravy"). Each word was constructed in three ways: (1) the VC transition was incompatible with the CV in either place, manner of articulation, or both; (2) the VC transition was eliminated and the steady-state portion of first vowel was substituted in its place; and (3) the original word. All versions of a particular word were identical with respect to duration, pitch contour, and amplitude envelope. While an intelligibility test revealed no differences among the three conditions, data from a paired comparison preference task and an unspeeded lexical decision task indicated that incompatible VC transitions hindered word perception, but lack of VC transitions did not. However, there were clear differences among the three conditions in the speeded lexical decision task for word stimuli, but not for nonword stimuli that were constructed in an analogous fashion. We discuss the use of lexical tasks for speech quality assessment and possible processes by which listeners recognize spoken words.
在VCV无意义形式中（例如/epsilondepsilon/），虽然CV过渡和VC过渡单独来看都是可感知的，但CV过渡在塞音的识别中占主导地位。因此，问题就出现了，VC过渡在单词感知中起什么作用（如果有作用的话）？刺激材料是双音节英语单词，其中中间的辅音要么是塞音，要么是擦音（例如，“feeding”和“gravy”）。每个单词以三种方式构建：（1）VC过渡在发音部位、发音方式或两者方面与CV不兼容；（2）VC过渡被消除，第一个元音的稳态部分被替换到其位置；（3）原始单词。特定单词的所有版本在持续时间、音高轮廓和振幅包络方面都是相同的。虽然清晰度测试显示三种条件之间没有差异，但配对比较偏好任务和无速度词汇判断任务的数据表明，不兼容的VC过渡会阻碍单词感知，但没有VC过渡则不会。然而，在针对单词刺激的快速词汇判断任务中，三种条件之间存在明显差异，但对于以类似方式构建的非单词刺激则不存在差异。我们讨论了使用词汇任务进行语音质量评估以及听众识别口语单词的可能过程。
