Cochlear Implant Inner-ear Prosthesis
Conditions
Interventions
None listed
Sponsors
Radboud Universiteit Nijmegen
Eligibility
Age
18 Years to 99 Years
Inclusion criteria
Inclusion criteria: • 18 years or older • Post-lingual deafness (deafness that developed after acquisition of speech and language; onset of deafness after the age of six) • Patient indicated for a cochlear implant • Normal or corrected to normal vision • Written informed consent
Exclusion criteria
Exclusion criteria: • Mental disabilities • Visual disabilities • Hearing loss as a result of meningitis or as part of a syndrome • Partial insertion of the cochlear implant • Patient received special education • Doubts, for any reason, about whether the patient may not be able to show up on all follow ups
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| The main study parameters are participants' performance changes on four measures of speech perception between baseline (one week after cochlear implant activation) and endpoint (eleven weeks after cochlear implant activation) performance: • Number of correctly repeated speech sound of consonant-vowel-consonant words • Number of correctly repeated keywords in sentences • Accuracy of keyword identification in conversational speech • Response time of word identification (in ms) in conversational speech | — |
Secondary
| Measure | Time frame |
|---|---|
| Secondary study parameters include performance on all cognitive and linguistic tasks and participants' subjectively experienced benefit of the cochlear implant: Learning • Statistical learning: Individual changes in click response times based on changes in the predictability with which items co-occur in the task. Memory • Verbal short-term memory: Proportion of correctly repeated syllables of nonwords • Short-term memory: Proportion of correctly repeated sequences of digits. • Working memory: Proportion of correctly repeated sequences of digits in reverse order. Attention • Attention switching control: Time ratio (in seconds) between the completion of two tasks: (a) connecting digits in ascending order (i.e., 1-2-3...); (b) alternatingly connecting numbers and letters in ascending order (i.e., 1-A-2-B-3-C...). • Selective attention: Time ratio (in ms) between response times in two conditions: participants mean response time to correctly identify the stimulus (i.e., whether a '>' or a ' - -), divided by response time in an incongruent condition (i.e., | — |
Countries
Netherlands
Outcome results
None listed