Development of the Voicing Contrast: Perception of Stop Consonants Perceptual development of the voicing contrast was investigated in two-year-old children, six-year-old children, and adults. Subjects were required to identify pre-vocalic stop consonants from synthetic speech stimuli-bees/peas, bear/pear, dime/time, and goat/coat. The stimuli differed with respect to the acoustic cue, voice onset time (VOT). Identification functions for labial, apical, and ... Research Article
Research Article  |   September 01, 1975
Development of the Voicing Contrast: Perception of Stop Consonants
 
Author Affiliations & Notes
  • Marsha A. Zlatin
    Purdue University, West Lafayette, Indiana
  • Roy A. Koenigsknecht
    Northwestern University, Evanston, Illinois
Article Information
Research Articles
Research Article   |   September 01, 1975
Development of the Voicing Contrast: Perception of Stop Consonants
Journal of Speech, Language, and Hearing Research, September 1975, Vol. 18, 541-553. doi:10.1044/jshr.1803.541
History: Received January 22, 1975 , Accepted May 19, 1975
 
Journal of Speech, Language, and Hearing Research, September 1975, Vol. 18, 541-553. doi:10.1044/jshr.1803.541
History: Received January 22, 1975; Accepted May 19, 1975

Perceptual development of the voicing contrast was investigated in two-year-old children, six-year-old children, and adults. Subjects were required to identify pre-vocalic stop consonants from synthetic speech stimuli-bees/peas, bear/pear, dime/time, and goat/coat. The stimuli differed with respect to the acoustic cue, voice onset time (VOT). Identification functions for labial, apical, and velar stops were plotted for each subject. Measurements of 50% crossover, lower and upper limits of the phoneme boundary, and phoneme boundary width were obtained from the identification functions. Significant age-dependent differences in perception of the voicing contrast were observed. The results were interpreted as indicating that the magnitude of VOT difference required for distinguishing between prevocalic stop cognates decreases as a function of the age of the listeners.

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