Department of Linguistics, Stanford University, Margaret Jacks Hall, Building 460, Stanford, California 94305-2150, USA.
J Acoust Soc Am. 2013 Jul;134(1):EL26-32. doi: 10.1121/1.4807432.
Effects of word-level phonetic variation on the recognition of words with different pronunciation variants (e.g., center produced with/(out) [t]) are investigated via the semantic- and pseudoword-priming paradigms. A bias favoring clearly articulated words with canonical variants ([nt]) is found. By reducing the bias, words with different variants show robust and equivalent lexical activation. The equivalence of different word forms highlights a snag for frequency-based theories of lexical access: How are words and word productions with vastly different frequencies recognized equally well by listeners? A process-based account is proposed, suggesting that careful speech induces bottom-up processing and casual speech induces top-down processing.
通过语义启动和假词启动范式，研究了词级语音变化对不同发音变体（例如，用/(out) [t] 发出的 center）识别的影响。发现存在一种偏向于发音清晰且具有标准变体 ([nt]) 的单词的偏差。通过减少这种偏差，不同变体的单词表现出了强大且等效的词汇激活。不同词形的等效性突出了基于频率的词汇访问理论的一个难题：听众如何同样好地识别频率差异极大的单词和单词形式？本文提出了一种基于过程的解释，认为仔细的发音会引起自下而上的处理，而随意的发音会引起自上而下的处理。
