First Advisor

Lisa Letcher-Glembo

Term of Graduation

Summer 1998

Date of Publication


Document Type


Degree Name

Master of Science (M.S.) in Speech: Speech and Hearing Sciences


Speech and Hearing Sciences




Articulation disorders, Speech disorders in children, Velopharyngeal insufficiency -- Treatment, Palate -- Surgery



Physical Description

1 online resource (v, 84 pages)


This descriptive study investigated the pattern of speech sound production before and after surgical management of velopharyngeal inadequacy in two subjects. The research questions asked were: (a) What type of speech patterns do subjects referred for surgical management of velopharyngeal incompetence demonstrate presurgically? (b) What changes in the speech patterns of the subjects are observed in the immediate month following surgery for velopharyngeal incompetence? (c) Do these changes settle into a stabilized pattern of speech production by 4 months postsurgery?

The subjects' speech productions were audio recorded for analysis using the Broen CVC Probe to obtain imitated single word elicitations at 1 month prior to surgery, 1 month postsurgery, and 4 months postsurgery. The principal investigator transcribed the 2 subjects' Broen CVC results when data collection was completed. Twenty-five percent of the subjects' speech samples were transcribed independently by a second examiner. Inter-rater reliability for phonetic transcription was at . 98 for initial and final phoneme transcription. The subjects' initial and final consonant productions were scored as correct or incorrect according to place, manner, voicing, and diacritic errors. Percentage of error in production was calculated. Error rates were compared over the three data collection periods.

Presurgically, Subject #1 's percentage of error for placement, manner, voicing, and diacritics ranged from 0% to 49%. Errors included nasality, partial de-voicing, breathiness, and interdentalization. Error rates 1 month postsurgery ranged from 0% to 38%. Errors included partial de-voicing, hyponasality, and interdentalization. Error rates 4 months postsurgery ranged from 0% to 24%, and included partial de-voicing and interdentalization.

Presurgically, percentage of error for Subject #2 in terms of place, manner, voicing, and diacritics ranged from O% to 52 % . Errors included nasality, weak consonant production, and partial de-voicing. One month postsurgery, error rates ranged from 0% to 35% and included hyponasality, excessive aspiration, and partial de-voicing. Four months postsurgery, error rates ranged from 0% to 30%, including partial de-voicing and excessive aspiration. Velopharyngeal competence had improved, as had accuracy of speech productions, but neither subject had achieved normal speech at 4 months postsurgery.


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