At a glance
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Evaluation of Listening Effort With Pupillometry in Cochlear Implant Users
In Brief
A clinical study evaluating Pupillometry, Evaluation of speech comprehension in quiet, and 4 other interventions for Sensorineural Hearing Loss and Cochlear Hearing Loss. Completed, enrolled 16 participants across 1 site.
Detailed Summary
Listening with a cochlear implant remains difficult and most listeners will report high levels of listening effort.The present study is a "pilot" aiming to evaluate listening effort for cochlear implant users. The listening effort is measured with pupillometry, by monitoring the variations of pupil size in response to different stimuli. The size of the pupil is known to increase with the listening effort. The listening effort is evaluated in two different situation: speech perception in quiet and speech perception in noise. The pupillometry measures will be compared for the two listening conditions. Moreover, the study will evaluate the relationship between objective (pupil dilatation) and subjective measures (auto evaluation) of listening effort, and between speech comprehension, cognitive abilities and listening effort.
Study Details
Timeline
Interventions
Measure of pupil dilatation simultaneously to the evaluation of speech intelligibility. The variation of the pupil size is monitored during the presentation of speech stimuli in quiet and in the presence of a background noise.
Three lists of 17 monosyllabic words (Lafon) are presented in quiet at 65 dB SPL. Listeners have to repeat what they understood. The results correspond to the percent of phonemes correctly identified.
Three lists of 17 monosyllabic words (Lafon) are presented in a wide band noise at 65 dB SPL with a SNR (signal to noise ratio) of +10 dB. Listeners have to repeat what they understood. The results correspond to the percent of phonemes correctly identified.
The Montreal Cognitive Assessment (MoCA) is a screening instrument to detect cognitive dysfunction. It assesses different cognitive domains: attention and concentration, executive functions, memory, language, visuoconstructional skills, conceptual thinking, calculations, and orientation. The time to administer the MoCA is approximately 10 minutes. The total possible score is 30 points. The test suggests the existence of a cognitive impairment if the participant scores less than 26 points. The test is presented on a single sheet of paper.
The participant has to represent, on a continuous line, the amount of listening effort he used when listening to the monosyllabic words presented in quiet. A score from 0 (no listening effort) to 10 (effort maximum) is extracted from his response.
The participant has to represent, on a continuous line, the amount of listening effort he used when listening to the monosyllabic words presented in the background noise. A score from 0 (no listening effort) to 10 (effort maximum) is extracted from his response.