Canonical Syllable Production And Perception In Infants With Hearing Loss

描述（由申请人提供）：关于助听器对早期识别的听力障碍（HI）婴儿语言习得影响的知识非常有限。这项研究的目的是通过解决缺乏理解的早期感知和生产能力如何出现在听力正常（NH）和听力障碍（HI）的婴儿，以改善语言的结果与HI的婴儿。为了实现这一目标，我们将集中在了解典型的咿呀学语（CB）的分布特性如何影响知觉偏好的音节在NH和HI婴儿。我们将重点关注CB，因为它是受早期放大影响的第一个类似言语的行为，它将HI与NH婴儿区分开来，它形成了第一个单词的基础，并且它的延迟预测了词汇发展的延迟。我们的目标是：（1）在两个时间段（目标1），检验在对规范音节的知觉偏好的发展中的组差异（NH vs HI）;（2）检验婴儿对规范音节的产生是否预测了他们自己对这些音节的知觉偏好（目标2）。48名婴儿（5- 15个月大）将参与：（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）.目的1：测试的假设，即知觉偏好的分布特征的CB开发作为一个结果的经验与CB。我们的假设预测，相比于牙牙学语前的基线，NH婴儿的偏好将在牙学语期间转向具有冠状唇起始的规范音节，而HI婴儿的偏好将转向具有唇状冠状起始的规范音节。我们的假设预测，与牙牙学语前基线相比，NH和HI婴儿的偏好将转向与FCH一致的CV共现，而不是与FCH不一致的共现。目标二：检验以下假设：婴儿个体的规范音节的产生预测了他们自己在牙牙学语过程中对音节分布特性的感知偏好。我们的假设预测，CV库存的NH婴儿将有更大比例的冠状辅音，这将与他们的知觉偏好。对于HI的婴儿，我们预计唇辅音在他们的剧目比冠更大的比例，这将与唇起始的知觉偏好。我们的假设预测，NH和HI婴儿的库存将有更大比例的CV共现符合FCH比违反FCH，这将与预测的音节，符合FCH的偏好。成果和影响：当这项研究的目的实现时，临床医生将能够使用CB生产作为一个结果的措施，充分的听觉输入在前语言阶段的基础上，以证据为基础的理解之间的关系可听度，婴儿是什么生产和感知的最早的发声放大的影响。

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.