Samuel A G, Newport E L
J Exp Psychol Hum Percept Perform. 1979 Aug;5(3):563-78. doi: 10.1037/h0078136.
Three selective adaptation experiments were run, using nonspeech stimuli (music and noise) to adapt speech continua ([ba]-[wa] and [cha]-[sha]). The adaptors caused significant phoneme boundary shifts on the speech continua only when they matched in periodicity: Music stimuli adapted [ba]-[wa], whereas noise stimuli adapted [cha]-[sha]. However, such effects occurred even when the adaptors and test continua did not match in other simple acoustic cues (rise time or consonant duration). Spectral overlap of adaptors and test items was also found to be unnecessary for adaptation. The data support the existence of auditory processors sensitive to complex acoustic cues, as well as units that respond to more abstract properties. The latter are probably at a level previously thought to be phonetic. Asymmetrical adaptation was observed, arguing against an opponent-process arrangement of these units. A two-level acoustic model of the speech perception process is offered to account for the data.
进行了三项选择性适应实验，使用非语音刺激（音乐和噪声）来适应语音连续体（[ba]-[wa]和[cha]-[sha]）。仅当适应刺激与语音连续体在周期性上匹配时，它们才会导致语音连续体上显著的音素边界偏移：音乐刺激适应[ba]-[wa]，而噪声刺激适应[cha]-[sha]。然而，即使适应刺激和测试连续体在其他简单声学线索（上升时间或辅音时长）上不匹配，这种效应仍然会出现。还发现适应刺激和测试项目的频谱重叠对于适应来说并非必要。这些数据支持存在对复杂声学线索敏感的听觉处理器，以及对更抽象属性做出反应的单元。后者可能处于先前被认为是语音层面的水平。观察到了不对称适应，这与这些单元的对立过程排列相悖。本文提供了一个语音感知过程的两级声学模型来解释这些数据。
