Perceptual Representation of Own Hand Size in Early Childhood and Adulthood
Perceptual Representation of Own Hand Size in Early Childhood and Adulthood
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DOI：
10.1038/s41598-020-62206-5
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发表时间：
2020-03-25
影响因子：
4.6
通讯作者：
Nava, Elena
中科院分区：
文献类型：
--
作者：
Giurgola, Serena;Bolognini, Nadia;Nava, Elena
手大小知觉扭曲是成人人类认知的特征。尽管揭示人类手部大小表征方式的发展很重要，但这一领域的研究仍处于初步阶段。事实上，手大小扭曲在幼儿时期是否存在和可靠，以及它们是否与成人的扭曲不同，为此类表征的出现和发展提供了更深入的洞察，目前还不清楚。我们通过比较4到6岁儿童和成人对自己手大小的表征来解决这个问题，这是通过两个强迫选择的视觉知觉任务进行评估的。为了测试参与者估计自己手大小的能力，儿童和成年人判断自己手的图片是否与实际尺寸相匹配，调整后的手看起来比自己的手小或大。结果显示，4至6岁的儿童倾向于低估自己的手的大小，而成年人低估自己的手的能力更弱。这一证据表明，身体各部位的知觉扭曲在儿童早期就已经存在，因此代表了人体表征的一个特征。
Hand size perceptual distortions characterize adult human cognition. Notwithstanding the importance of uncovering how hand size representation develops in humans, studies in this field are still at a preliminary stage. Indeed, it is yet to be understood whether hand size distortions are present and reliable in early childhood and whether they differ from adults' distortions, offering a more in-depth insight into the emergence and development of such representations. We addressed this issue by comparing 4- to 6- year-old children and adults' representation of their own hand size, as assessed with a 2-forced choice visual perceptual task. To test participants' ability to estimate their own hand size, children and adults judged whether pictures of their own hand, resized to appear smaller or bigger than their own hand, matched or not its actual dimension. Results show that children aged 4 to 6 years tend to underestimate their own hand size, while adults underestimate their own hand more weakly. This evidence suggests that body-parts perceptual distortions are already in place in early childhood, and thus represent a characteristic of the human body representation.