Preterm and Term Infants' Perception of Temporally Coordinated Syllable-Object Pairings: Implications for Lexical Development
Preterm and Term Infants' Perception of Temporally Coordinated Syllable-Object Pairings: Implications for Lexical Development
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DOI：
10.1044/1092-4388(2013/12-0403
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发表时间：
2014-02-01
影响因子：
2.6
通讯作者：
Perenyic, Agnes
中科院分区：
文献类型：
--
作者：
Gogate, Lakshmi;Maganti, Madhavilatha;Perenyic, Agnes
目的：本实验对34例足月儿和低危早产儿(胎龄32-36周)在2月龄(34例)和16例校正年龄(16例)进行检测。这项研究调查了早产儿是否表现出与足月儿相比对同步音节-物体配对的敏感度延迟。方法：首先，婴儿习惯于单音节[ta(H)]或[ga(H)]，与4个玩具物体中的1个动作同步，即螃蟹、豪猪、星星或羊排。结果：在排除习惯化过程中的差异注视时间后，研究发现，相对于足月儿，早产儿对客体和音节的变化都表现出弱化的表情。结论：这些发现表明，即使是近足月的早产儿，相对于足月儿，他们对音节-宾语配对的同步性的敏感度也存在延迟。鉴于同步性在6-9个月婴儿的词汇映射中扮演的重要角色，这种对同步性敏感性的早期延迟可能是大龄早产儿词汇映射延迟的一个指标。
Purpose: This experimental study examined term infants (n = 34) and low-risk near-term preterm infants (gestational age 32-36 weeks) at 2 months chronological age (n = 34) and corrected age (n = 16). The study investigated whether the preterm infants presented with a delay in their sensitivity to synchronous syllable-object pairings when compared with term infants.Method: First, infants were habituated to a single syllable, [ta(h)] or [ga(h)], spoken in synchrony with the motions of 1 of 4 toy objects, a crab, a porcupine, a star, or a lamb chop. Next, the infants received 2 syllable-and 2 object-change test trials, counterbalanced for order.Results: After factoring out differential looking time during habituation, the study found that preterm infants showed attenuated looks to the change in the object and the change in the syllable relative to term infants.Conclusions: These findings suggest that even near-term preterm infants present with a delay in their sensitivity to synchrony in syllable-object pairings relative to term infants. Given the important role that synchrony plays in word mapping at 6-9 months, this early delay in sensitivity to synchrony might be an indicator of word mapping delays found in older preterm infants.