"How to milk a coat": The effects of semantic and acoustic information on phoneme categorization
"How to milk a coat": The effects of semantic and acoustic information on phoneme categorization
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DOI：
10.1121/1.422787
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发表时间：
1998-05-01
影响因子：
2.4
通讯作者：
Shapiro, LP
中科院分区：
文献类型：
--
作者：
Borsky, S;Tuller, B;Shapiro, LP
这项研究检查了句子上下文和局部声学结构对音素分类的影响。来自 10 步 GOAT-COAT 连续体的目标刺激，仅在发声时间 (VOT) 的时间提示上有所不同，被嵌入到载体句子中，这些句子的解释偏向于“山羊”或“外套”。当受试者听句子时，他们也会通过指示视觉探针是否与他们听到的目标刺激相匹配来尽快对视觉探针做出反应。结果表明，VOT 和句子上下文的交互显着影响感知边界附近刺激的识别和 RT；识别函数显示出有利于有偏见的上下文的边界偏移，并且每个上下文的峰值响应时间反映了偏移的识别边界。此外，当响应与句子上下文一致而不是不一致时，识别类别边界附近的刺激的响应时间会更快。边界区域中一致响应与不一致响应的响应时间差异被解释为取决于初始语音分析的结果；可能不明确的分类可能需要接受额外的评估，其中上下文一致的响应是首选且更早可用的。 (C) 1998 年美国声学学会。
This study examined the effect of sentence context and local acoustic structure on phoneme categorization. Target stimuli from a 10-step GOAT-COAT continuum, differing only on a temporal cue for voice onset time (VOT), were embedded in carrier sentences that biased interpretation toward either "goat" or "coat." While subjects listened to the sentences they also responded as quickly as possible to a visual probe by indicating whether the probe matched the target stimulus they heard. Results showed that the interaction of VOT and sentence context significantly affected both identification and RT for stimuli near the perceptual boundary; the identification function showed a boundary shift in favor of the biased context and peak response times for each context reflected the shifted identification boundaries. In addition, response times were faster for identification of stimuli near the category boundary when responses were congruent, rather than incongruent with the sentence context. The response time differences for congruent versus incongruent responses in the boundary region are interpreted as depending on the results of initial phonological analysis; potentially ambiguous categorizations may be subject to additional evaluation in which a context-congruent response is both preferred and available earlier. (C) 1998 Acoustical Society of America.