PERCEPTION OF SPEECH SOUNDS

双重知觉是一种实验室现象，在这种现象中，一个刺激或一个刺激成分同时对人类听者的两种不同知觉做出贡献。这种现象的主要演示涉及改变语音音节(/da/或/ga/)的关键成分的质量，使得该成分作为单独的非语音事件(啁啾)被听到，同时也有助于对音节的感知。重要的问题是，这个演示是反映了一种处理语音信息的特殊模式，还是反映了将刺激归因于特定声源的听觉系统中的一种普遍感知倾向。许多言语感知现象可以在非人类灵长类动物身上复制。猴子表现出的感知能力不能归因于人类特有的语音处理机制，而可能是更普遍的听觉机制。相反，人类听者成功而猴子失败的知觉任务是人类特殊处理机制的很好的潜在候选者。1997年，我们对非人类灵长类动物进行了双重感知测试。这些实验使用合成的/da/和/ga/音节作为刺激。双工知觉测试对理论构建很有价值，因为它们为人类语音处理机制的初始状态提供了两个对立的模型的关键测试。

Duplex perception is a laboratory phenomenon in which one stimulus, or one stimulus component, simultaneously contributes to two distinct percepts in human listeners. The primary demonstrations of this phenomenon involve altering the quality of a critical component of a speech syllable (/da/ or /ga/) so that the component is heard out as a separate, nonspeech event (a chirp) while also contributing to the perception of the syllable. The important question is whether this demonstration reflects a specialized mode for processing speech information, or a generalized perceptual tendency in the auditory system for attributing stimuli to a particular sound source. Many speech perception phenomena can be replicated in nonhuman primates. The perceptual abilities that monkeys demonstrate cannot be attributed to uniquely human speech processing mechanisms and may be due to more general auditory mechanisms. Conversely, perceptual tasks on which human listeners succeed and monkeys fail are good potential candidates for special-processing mechanisms in humans. In 1997, we conducted Duplex Perception tests with nonhuman primates. These experiments used synthetic /da/ and /ga/ syllables as stimuli. Tests of Duplex Perception are valuable for theory construction in that they provide a critical test of the two opposing models of the initial status of the mechanisms underlying speech processing in humans.