ERIC Number: EJ848546
Record Type: Journal
Publication Date: 2009-Jun
Abstractor: As Provided
Reference Count: 0
Effect of Vowel Identity and Onset Asynchrony on Concurrent Vowel Identification
Hedrick, Mark S.; Madix, Steven G.
Journal of Speech, Language, and Hearing Research, v52 n3 p696-705 Jun 2009
Purpose: The purpose of the current study was to determine the effects of vowel identity and temporal onset asynchrony on identification of vowels overlapped in time. Method: Fourteen listeners with normal hearing, with a mean age of 24 years, participated. The listeners were asked to identify both of a pair of 200-ms vowels (referred to as "double vowels") presented either simultaneously or with a temporal asynchrony ranging from 25 ms to 150 ms in 25-ms steps. The stimuli were synthetic steady-state vowels /i ae [script] u [reversed epsilon]/ arranged in seven combinations: /u i/, /ae [script]/, /[reversed epsilon] [script]/, /[reversed epsilon] ae/, /ae i/, /[reversed epsilon] i/, and /[reversed epsilon] u/. Results: Listeners' responses revealed that one vowel of a pair was identified correctly more often than the other vowel (known as "vowel dominance"). Vowel dominance effects were seen for 6 of the 7 vowel pairs, and there was improvement of vowel identification with increasing temporal separation between vowels for 5 of the 7 pairs. Vowel pairs with the vowel /[reversed epsilon]/ consistently yielded improved identification with increases in temporal asynchrony. Discussion: Peripheral masking cannot explain the patterns of results of this study. A more parsimonious explanation may be perceptual anchoring.
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Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Authoring Institution: N/A