University of Tennessee, Health Science Center, TN, USA.
J Speech Lang Hear Res. 2013 Aug;56(4):1108-19. doi: 10.1044/1092-4388(2012/12-0110). Epub 2013 Jun 24.
Infant-directed speech (IDS) facilitates language learning in infants with normal hearing, compared to adult-directed speech (ADS). It is well established that infants with normal hearing prefer to listen to IDS over ADS. The purpose of this study was to determine whether infants with hearing impairment (HI), like their NH peers, show a listening preference for IDS over ADS.
A total of 36 infants-9 HI infants (mean chronological age of 19.1 with mean listening age of 7.7 months), 9 NH infants with similar average listening age (7.8 months), and 9 NH infants with similar average chronological age (18.6 months)-were tested on their listening preference for IDS compared with ADS using the central fixation preference procedure.
Infants with HI significantly preferred listening to IDS over ADS. The preference for IDS was also seen in the younger NH infants, but not older NH controls. Additionally, HI infants showed shorter overall looking times as compared to either NH group.
Although infants with hearing loss displayed a shorter looking time to speech compared to NH controls, HI infants nonetheless appear to have sufficient access to the speech signal to display a developmentally appropriate preference for IDS over ADS.
与成人指导语（ADS）相比，婴儿指导语（IDS）能促进正常听力婴儿的语言学习。已有充分证据表明，正常听力婴儿更喜欢听 IDS 而非 ADS。本研究旨在确定听力障碍（HI）婴儿是否像他们的 NH 同龄人一样，表现出对 IDS 而非 ADS 的听力偏好。
共有 36 名婴儿（9 名 HI 婴儿，平均月龄为 19.1 个月，平均听力年龄为 7.7 个月；9 名 NH 婴儿，听力年龄相近，为 7.8 个月；9 名 NH 婴儿，平均月龄相近，为 18.6 个月）参与了本研究。采用中央注视偏好程序，对他们对 IDS 与 ADS 的听力偏好进行了测试。
HI 婴儿明显更喜欢听 IDS 而非 ADS。这一偏好也存在于年龄较小的 NH 婴儿中，但在年龄较大的 NH 对照组中则不存在。此外，HI 婴儿的整体注视时间比任何 NH 组都要短。
尽管听力损失婴儿与 NH 对照组相比，对言语的注视时间较短，但 HI 婴儿似乎仍能充分接触到言语信号，表现出对 IDS 而非 ADS 的发展适当偏好。
