手部偏好婴儿的物体技能优势

Symmetry Pub Date : 2024-09-04 DOI:10.3390/sym16091148
Emily C. Marcinowski, George F. Michel, Eliza L. Nelson
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引用次数: 0

摘要

在出生后的第一年里,婴儿接触物品的方式发生了巨大变化。在这一时期,有些婴儿在获取物品时表现出一致的手部偏好,而有些婴儿则没有明显的偏好。本研究的目的是测试侧向化是否会在早期物品管理技能的发展中带来优势。我们研究了侧位婴儿与没有手部偏好的婴儿相比,在如何与多个物体互动方面是否表现出不同的成长速度。在一项纵向研究中,我们对 303 名 6 到 12 个月大的婴儿进行了 7 次月访,评估了他们的手部偏好和物体管理技能(即最多握住三个物体)。基于群体的轨迹建模(GBTM)确定了以下三个手的偏好轨迹群体:左手、右手和无偏好(NP)。以 "无偏好 "组婴儿为参照组,通过分层广义线性模型(HGLM)进行统计比较后发现,虽然所有婴儿的物品管理技能随着时间的推移呈现出相似的趋势,但侧向化婴儿比非侧向化婴儿更具优势。相对于 NP 婴儿,右侧组和左侧组婴儿从拿一个物体过渡到拿两个物体的速度更快。我们还需要进一步研究,以确定这种早期物品技能优势是否会进而演变成更复杂的处理多个物品的能力。
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Object Skill Advantage in Infants with a Hand Preference
How infants engage with objects changes dramatically over the first year of life. While some infants exhibit a consistent hand preference for acquiring objects during this period, others have no identifiable preference. The goal of this study was to test whether lateralization confers an advantage in the development of early object management skills. We examined whether lateralized infants show different rates of growth in how they interact with multiple objects as compared to infants without a hand preference. In a longitudinal study consisting of seven monthly visits from 6 to 12 months, 303 infants were assessed for their hand preference and object management skill (i.e., holding up to three objects). Group-Based Trajectory Modeling (GBTM) identified the following three hand preference trajectory groups: Left, Right, and No Preference (NP). A Hierarchical Generalized Linear Model (HGLM) with the NP infants as the reference group for statistical comparisons revealed that while all the infants showed similar trends in their object management skills over time, the lateralized infants had an advantage over the non-lateralized infants. The infants in the Right and Left groups transitioned from holding one to two objects more quickly relative to the NP infants. Further research is needed to determine if this early object skill advantage cascades to a more complex handling of multiple objects.
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