Eimas P D, Siqueland E R, Jusczyk P, Vigorito J
Science. 1971 Jan 22;171(3968):303-6. doi: 10.1126/science.171.3968.303.
Discriminiationi of synthetic speech sounds was studied in 1- and 4-month-old infants. The speech sounds varied along an acoustic dimension previously shown to cue phonemic distinctions among the voiced and voiceless stop consonants in adults. Discriminability was measured by an increase in conditioned response rate to a second speech sound after habituation to the first speech sound. Recovery from habituation was greater for a given acoustic difference when the two stimuli were from different adult phonemic categories than when they were from the same category. The discontinuity in discrimination at the region of the adult phonemic boundary was taken as evidence for categorical perception.
对1个月和4个月大的婴儿进行了合成语音辨别研究。语音沿着一个声学维度变化，该维度先前已被证明可提示成人中浊音和清音塞音之间的音位区别。辨别能力通过在对第一个语音产生习惯化后，对第二个语音的条件反应率增加来衡量。当两个刺激来自不同的成人音位类别时，与来自同一类别的情况相比，对于给定的声学差异，从习惯化中恢复的程度更大。在成人音位边界区域辨别上的不连续性被视为类别知觉的证据。
