Phonetic category activation predicts the direction and magnitude of perceptual adaptation to accented speech.
Phonetic category activation predicts the direction and magnitude of perceptual adaptation to accented speech.
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DOI：
10.1037/xhp0001037
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发表时间：
2022-09
影响因子：
2.1
通讯作者：
Holt, Lori L.
中科院分区：
文献类型：
--
作者：
Wu, Yunan Charles;Holt, Lori L.
关键词：
不熟悉的口音可以系统地改变语音声学远离社区规范，降低理解。然而，有限的曝光可以提高理解力。这种感知适应表明从声学到语音表示的映射是动态的，而不是固定的。但是，是什么推动了调整，这是有争议的。监督学习解释了经由消歧信息激活内部语音表示生成关于通常与该表示相关联的语音输入模式的预测。当实际输入与预测不匹配时，将调整映射。我们测试了两个假设，这个帐户跨辅音和元音的听众分类语音传达英语一样的声学规律或人工口音。在各种条件下，信号操作影响两个声学维度中哪一个最好地传达了类别身份，并预测哪个维度将表现出感知适应的效果。此外，强度的语音类别激活，估计依赖于占主导地位的声学尺寸的分类反应，预测的适应性的大小，观察到的听众。结果与监督学习账户的预测一致，表明感知适应来自语音类别激活，与类别一致的声学输入模式的相应预测，以及当输入与这些期望不匹配时，随后的语音感知的调整。
Unfamiliar accents can systematically shift speech acoustics away from community norms and reduce comprehension. Yet, limited exposure improves comprehension. This perceptual adaptation indicates that the mapping from acoustics to speech representations is dynamic, rather than fixed. But, what drives adjustments is debated. Supervised learning accounts posit that activation of an internal speech representation via disambiguating information generates predictions about patterns of speech input typically associated with the representation. When actual input mismatches predictions, the mapping is adjusted. We tested two hypotheses of this account across consonants and vowels as listeners categorized speech conveying an English-like acoustic regularity or an artificial accent. Across conditions, signal manipulations impacted which of two acoustic dimensions best conveyed category identity, and predicted which dimension would exhibit the effects of perceptual adaptation. Moreover, the strength of phonetic category activation, as estimated by categorization responses reliant on the dominant acoustic dimension, predicted the magnitude of adaptation observed across listeners. The results align with predictions of supervised learning accounts, suggesting that perceptual adaptation arises from speech category activation, corresponding predictions about the patterns of acoustic input that align with the category, and adjustments in subsequent speech perception when input mismatches these expectations.
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影响因子：
2.6
作者：
Norris, D;McQueen, JM;Cutler, A
通讯作者：
Cutler, A
影响因子：
3.4
作者：
Lehet, Matthew;Holt, Lori L.
通讯作者：
Holt, Lori L.
影响因子：
2.4
作者：
Clarke, CM;Garrett, MF
通讯作者：
Garrett, MF
DOI：
10.1037/xhp0000196
发表时间：
2016-07-01
影响因子：
2.1
作者：
Guediche, Sara;Fiez, Julie A.;Holt, Lori L.
通讯作者：
Holt, Lori L.
影响因子：
2.4
作者：
HAGGARD, M;AMBLER, S;CALLOW, M
通讯作者：
CALLOW, M