Early (under 2 years) and late (after 2 years) unilateral or bilateral cochlear implantation Vroege (onder de 2 jaar) en late (na de 2 jaar) unilaterale of bilaterale cochleaire implantatie
Conditions
Interventions
The intervention consists of 4 experimental behavioural psycholinguistic tests of 2-3 minutes (on average) each consisting of practice and experimental trials. This series of tests is preceded by a m
Sponsors
Leiden University Medical Center
Eligibility
Inclusion criteria
Inclusion criteria: a) Early Implanted Group. Having undergone cochlear implantation before the age of 1;6; having used the implant for a gross duration of between 3;0 and 3;6 years. Half of them are left implanted and half right implanted. b) Late Implanted Group. Having undergone cochlear implantation before the age of 3;0 and 4;0; having used the implant for a gross duration of between the 3;0 and 3;6 years. Half of them are left implanted and half right implanted. c) Hearing-Age Matched Group. Aged between 3;0 and 3;6; Dutch nationality. d) Younger Chronological-Age Matched Group. Aged between 4;0 and 4;6; Dutch nationality. e) Older Chronological-Age Matched Group. Aged between 7;0 and 7;6; Dutch nationality.
Exclusion criteria
Exclusion criteria: a/b) Early Implanted Group. Reported medical problems related to the CI; multilingual development; bilateral implantation. c/d/e) Control groups. Reported audiological or psychosocial problems; multilingual development
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| percentage correct; reaction time; Percentile score; acoustic analysis of speech: means and standard deviations of fundamental frequency measures; in Hz) intensity masures (in dB), jitter (as ppq5), shimmer (a quotient of amplitude variablity) | — |
Secondary
| Measure | Time frame |
|---|---|
| Same as the primary outcomes | — |
Contacts
Public ContactDaan van de Velde
Outcome results
None listed