Canonical Syllable Production And Perception In Infants With Hearing Loss

描述（由申请人提供）：关于助听器对早期发现的听力障碍婴儿语言习得的影响的知识非常有限。本研究的目的是通过解决缺乏对正常听力（NH）和听力障碍（HI）婴儿早期感知和生产能力的理解来改善HI婴儿的语言结果。为了实现这一目标，我们将重点了解规范咿呀学语（CB）的分布特性如何影响新生儿和新生儿婴儿对音节的感知偏好。我们将重点关注慢语速，因为它是受早期放大影响的第一个类言语行为，它将HI婴儿与NH婴儿区分开来，它构成了第一个单词的基础，它的延迟预示着词汇发展的延迟。我们的目标是(1)在两个时间段内检验群体差异（NH vs HI）对规范音节知觉偏好的发展（目的1）和(2)检验婴儿对规范音节的产生是否能预测他们自己对这些音节的知觉偏好（目的2）。48名5- 15个月大的婴儿(a)听力正常（n=24）和(b)轻度至重度感音神经性听力损失（n=24）将参与研究。目的1：检验对CB分布特征的感知偏好是CB经验的结果这一假设。我们的假设预测，与前牙牙学语基线相比，NH婴儿的偏好将在牙牙学语期间转向冠状音而不是唇部音的规范音节，而HI婴儿的偏好将转向唇状音而不是冠状音的规范音节。我们的假设预测，与学步前的基线相比，NH和HI婴儿的偏好都将转向与FCH一致的CV共现，而不是与FCH不一致的共现。目的2：验证婴儿在咿呀学语过程中对音节分布特性的感知偏好，即个体标准音节的产生。我们的假设预测NH婴儿的CV量表将有更大比例的冠状辅音，这将与他们的感知偏好相关。对于患有HI的婴儿，我们预计他们的发音中唇辅音的比例要大于冠音，这将与对唇音发病的感知偏好有关。我们的假设预测NH和HI婴儿的量表中，与FCH一致的CV共现比例大于违反FCH的CV共现比例，这将与预测的与FCH一致的音节偏好相关。结果和影响：当本研究的目标实现时，临床医生将能够基于对可听性、婴儿在受放大影响的最早发声中产生和感知的关系的循证理解，将CB产生作为语言前阶段足够听觉输入的结果测量。

DESCRIPTION (provided by applicant): Knowledge regarding the effects of hearing aids on speech acquisition is very limited in early-identified infants with hearing impairment (HI). The goal of this research is to improve language outcomes in infants with HI by addressing the lack of understanding of how early perception and production capacities emerge in infants with normal hearing (NH) and hearing impairment (HI). To attain this goal we will focus on understanding how the distributional properties of canonical babbling (CB) affect perceptual preferences for syllables in NH and HI infants. We will focus on CB as it is the first speech-like behavior affected by early amplification, it differentiates HI from NH infants, it forms the foundation for first words, and its delay predicts delays in vocabulary development. Our objectives are to (1) examine group differences (NH vs HI) in the development of perceptual preferences for canonical syllables at two time periods (Aim 1) and (2) examine whether infants' production of canonical syllables predicts their own perceptual preference for these syllables (Aim 2). Forty- eight infants (5- 15 months of age) with: (a) normal hearing sensitivity (n=24), and (b) mild-to-severe sensorineural hearing loss (n=24), will participate. Aim 1: Test the hypothesis that perceptual preference for the distributional characteristics of CB develops as a result of experience with CB. Our hypothesis predicts that compared to a pre-babbling baseline, NH infants' preferences will shift toward canonical syllables with coronal over labial onsets during the babbling period, whereas HI infants' preferences will shift towards canonical syllables with labial over coronal onsets. Our hypothesis predicts that compared to a pre-babbling baseline, both NH and HI infants' preferences will shift toward CV co-occurrences that are consistent with FCH over co-occurrences that are not consistent with FCH. Aim 2: Test the hypothesis that individual infants' production of canonical syllables predicts their own perceptual preference for syllable distributional properties during babbling. Our hypothesis predicts that the CV inventory of infants with NH will have a greater proportion of coronal consonants and that this will correlate with their perceptual preference. For infants with HI, we expect a greater proportion of labial consonants in their repertoire than coronals and this will correlate with a perceptual preference for labial onsets. Our hypothesis predicts that both NH and HI infants' inventories will have a greater proportion of CV co-occurrences that are consistent with FCH than that violate FCH, and this will correlate with the predicted preference for syllables that are consistent with FCH. Outcomes and Impact: When the aims of this research are achieved clinicians will be able to use CB production as an outcome measure of adequate auditory input during the pre-linguistic stage based on an evidence-based understanding of the relationship between audibility, what the infant is producing and perceiving in the earliest vocalizations impacted by amplification.