Development of the Voicing Contrast: A Comparison of Voice Onset Time in Stop Perception and Production The acoustic cue voice onset time (VOT) was used to study development of the voicing contrast in 10 two-year-old children, 10 six-year-old children, and 20 adults. Thirty utterances of the words bees, peas, bear, pear, dime, time, goat, and coat were elicited from each subject, VOT measured, and individual production ... Tutorial
Tutorial  |   March 01, 1976
Development of the Voicing Contrast: A Comparison of Voice Onset Time in Stop Perception and Production
 
Author Affiliations & Notes
  • Marsha A. Zlatin
    Purdue University, West Lafayette, Indiana
  • Roy A. Koenigsknecht
    Northwestern University, Evanston, Illinois
Article Information
Tutorials
Tutorial   |   March 01, 1976
Development of the Voicing Contrast: A Comparison of Voice Onset Time in Stop Perception and Production
Journal of Speech, Language, and Hearing Research, March 1976, Vol. 19, 93-111. doi:10.1044/jshr.1901.93
History: Received March 24, 1975 , Accepted October 27, 1975
 
Journal of Speech, Language, and Hearing Research, March 1976, Vol. 19, 93-111. doi:10.1044/jshr.1901.93
History: Received March 24, 1975; Accepted October 27, 1975

The acoustic cue voice onset time (VOT) was used to study development of the voicing contrast in 10 two-year-old children, 10 six-year-old children, and 20 adults. Thirty utterances of the words bees, peas, bear, pear, dime, time, goat, and coat were elicited from each subject, VOT measured, and individual production distributions for labial, apical, and velar stops plotted. Significant age-related differences were shown for mean VOT, mean lead time for voiced stops, range of production, and discreteness of voicing categories. VOT identification functions for the same words that were examined in the production portion of the investigation were obtained for these subjects from their judgments of synthetic speech stimuli. The relationship between identification and production was examined by assessing the degree of correspondence between the perception and production VOT values. Results of this analysis showed a developmental pattern of change primarily for the voiceless stops in the form of increased correspondence between perceptual identification categories and production VOT values. Three stages for acquisition of the voicing contrast related to VOT are indicated.

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