Department of Psychological & Brain Sciences, University of Louisville, Louisville, KY, USA.
Department of Communication Sciences and Disorders, Chapman University, Orange, CA, USA.
Infancy. 2020 Nov;25(6):827-850. doi: 10.1111/infa.12363. Epub 2020 Aug 16.
To better explain variation in language acquisition in children with hearing loss, this study examined vocal (e.g., vocalization) and lexical (e.g., word) imitation in spontaneous interactions between mothers and children with 12 months of hearing experience using their cochlear implants (n = 12; mean age 27.9 months). Hearing children in two control groups were matched to children with cochlear implants, either by child chronological age (n = 12; mean age = 27.4 months) or by child hearing experience (n = 12; mean age 12 months). All three groups of mother-child dyads were audio-recorded playing together. Mothers and children in all groups imitated their partners' vocalization and word utterances; however, the cochlear implant and hearing experience-matched groups produced fewer word imitations than the age-matched group. The frequency of preceding child vocalization or word production predicted maternal imitation type (vocalization or word); however, frequency of maternal vocalization predicted child vocalization imitation only. The results showed that child hearing experience affected imitation in both communication partners.
为了更好地解释听力损失儿童语言习得的差异，本研究使用人工耳蜗检查了 12 个月听力经验的母亲和儿童在自然互动中的发声（例如发声）和词汇（例如单词）模仿（n=12；平均年龄 27.9 个月）。通过儿童的实际年龄（n=12；平均年龄=27.4 个月）或儿童的听力经验（n=12；平均年龄 12 个月），将两个对照组的听力正常儿童与耳蜗植入物的儿童相匹配。所有三组母婴对子都进行了一起玩耍的录音。所有组的母亲和儿童都模仿了他们伴侣的发声和单词发音；但是，耳蜗植入物和听力经验匹配组的单词模仿次数比年龄匹配组少。儿童发声或单词产生的先前频率预测了母亲模仿的类型（发声或单词）；但是，母亲发声的频率仅预测了儿童发声模仿。结果表明，儿童的听力经验影响了两个交流伙伴的模仿。
