Listening Effort in Cochlear Implant Users
试验速览
- 阶段
- 不适用
- 状态
- 招募中
- 入组人数
- 400
- 试验地点
- 1
- 主要终点
- Speech intelligibility
研究概览
简要总结
People with hearing loss experience extra effort when listening, which can lead to severe psychological barriers to communication and social participation. Listening effort can lead to fatigue, mental strain, burnout, medical sick leave, and the need for increased time to recover from regular daily activities. This proposal aims to understand effort changes on a moment-to-moment basis during listening, how long the effort lasts, and how the planning and execution of effort is impacted by the experience of using a cochlear implant.
详细描述
General methods:
Speech recognition testing: The main experimental task is listening to speech in the free field in a sound-attenuated booth. Traditional speech recognition consists of hearing and repeating sentences, and these studies will vary on that general theme with modifications to suit the specific aims of the project. For example, some stimuli are repeated twice before verbal response, and some are questions and answers rather than declarative sentences. The investigators have developed the stimuli specifically for each experiment, always avoiding emotionally evocative stimuli since they can have large effects on pupil dilation.
Intelligibility: The investigators will track percent-correct scores for whole sentences and words within each sentence. The investigators also track the position of mistakes during the sentence (e.g. first word, last word), and whether the participant's response could feasibly be a sensible utterance, or whether it lacks any coherent meaning, because this factor has such a large effect on listening effort.
The investigators will test normal-hearing (NH, or TH Typical Hearing) listeners' perception of both regular speech and vocoded speech, allowing us to separately examine the influence of signal degradation separately from the chronic experience of hearing difficulty.
Pupillometry: During speech recognition tests, changes in the participant's pupil size will be monitored by an Eyelink eye tracker placed 50 cm from the eyes. Phasic pupil dilations are linked with experiment timing landmarks interpreted as changes in listening effort, based on numerous published studies.
研究设计
- 研究类型
- Interventional
- 分配方式
- Non Randomized
- 干预模型
- Factorial
- 主要目的
- Basic Science
- 盲法
- None
入排标准
- 年龄范围
- 18 Years 至 75 Years（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •To be eligible for this study, a participant must:
- •Be an adult between the age of 18 to 75 years
- •Have had normal hearing and speech/language development as a young child
- •For younger NH listeners: have normal audiometric thresholds below 25 dB HL at frequencies between 250 and 8000 Hz
- •for cochlear implant listeners: at least 6 months experience with a cochlear implant
- •For older (55+ years) age-matched listeners with no cochlear implant: normal audiometric thresholds below 25 dB HL at frequencies between 250 and 2000 Hz and thresholds below 35 dB HL (hearing level) between 4000 and 8000 Hz
- •For cochlear implant listeners: be able to recognize spoken words in English at a rate of at least 50%
- •Be a competent speaker of north American English
- •Lack language-learning or other cognitive disabilities
- •Lack of auditory neuropathy spectrum disorder
排除标准
- •unable to fix gaze position
- •eye disease preventing typical changes in pupil dilation
- •lack of perceptual and productive fluency in English
研究组 & 干预措施
Typical-hearing controls
Typical-hearing controls. Speech recognition testing: Listening to and repeating speech in the free field in a sound-attenuated booth. We track percent-correct scores for whole sentences and words within each sentence. Changes in the participant's pupil size will be monitored by an Eyelink eye tracker placed 50 cm from the eyes. Phasic pupil dilations are linked with experiment timing landmarks interpreted as changes in listening effort.
干预措施: sentence manipulations (Behavioral)
Cochlear implant participants
Participants with cochlear implants. Speech recognition testing: Listening to and repeating speech in the free field in a sound-attenuated booth. We track percent-correct scores for whole sentences and words within each sentence. Changes in the participant's pupil size will be monitored by an Eyelink eye tracker placed 50 cm from the eyes. Phasic pupil dilations are linked with experiment timing landmarks interpreted as changes in listening effort.
干预措施: sentence manipulations (Behavioral)
结局指标
主要结局
Speech intelligibility
时间窗: 60 - 90 minute testing session
Intelligibility is scored by tallying the accuracy of spoken responses to auditory speech stimuli
Listening effort
时间窗: 60 - 90 minute testing session
Listening effort is inferred by measuring changes in pupil dilation linked to stimulus landmarks, as well as changes in microsaccade rate and blinks
次要结局
未报告次要终点