Nonword imitation by children with cochlear implants: consonant analyses.
OBJECTIVE
To complete detailed linguistic analyses of archived recordings of pediatric cochlear implant users' imitations of nonwords; to gain insight into the children's developing phonological systems and the wide range of variability in nonword responses.


METHODS
Nonword repetition: repetition of 20 auditory-only English-sounding nonwords.


METHODS
Central Institute for the Deaf "Education of the Deaf Child" research program, St Louis, Mo.


METHODS
Eighty-eight 8- to 10-year-old experienced pediatric cochlear implant users.


METHODS
Several different consonant accuracy scores based on the linguistic structure (voicing, place, and manner of articulation) of the consonants being imitated; analysis of the errors produced for all consonants imitated incorrectly.


RESULTS
Seventy-six children provided a response to at least 75% of the nonword stimuli. In these children's responses, 33% of the target consonants were imitated correctly, 25% of the target consonants were deleted, and substitutions were provided for 42% of the target consonants. The children tended to correctly reproduce target consonants with coronal place (which involve a mid-vocal tract constriction) more often than other consonants. Poorer performers tended to produce more deletions than the better performers, but their production errors tended to follow the same patterns as the better performers.


CONCLUSIONS
Poorer performance on labial consonants suggests that scores were affected by the lack of visual cues such as lip closure. Oral communication users tended to perform better than total communication users, indicating that oral communication methods are beneficial to the development of pediatric cochlear implant users' phonological processing skills.
Dillon
Caitlin
C
Indiana University, Bloomington, USA. cmdillon@indiana.edu
Pisoni
David B
DB
Cleary
Miranda
M
Carter
Allyson K
AK
D002648:Child; D003054:Cochlear Implants; D003145:Communication Methods, Total; D003463:Cues; D006801:Humans; D019986:Persons with Hearing Disabilities / Q000523:psychology*; D010700:Phonetics; D013067:Speech Perception; D013647:Task Performance and Analysis