Two experiments examined the development of the ability to encode, maintain, and update integrated representations of occluded objects' locations and featural identities in working memory across toddlerhood. Sixty-eight 28- to 40-month-old US toddlers (13 Asian or Pacific Islander, 6 Black, 48 White, 1 multiracial; 40 girls; tested between February 2015 and July 2017) tracked the locations of different color beads that were hidden simultaneously (Experiment 1) or sequentially (Experiment 2). Toddlers' ability to reliably store feature-location bound object representations in working memory varied as a function of age, memory load, and task demands. These results bridge a developmental gap between infancy and early childhood and provide new insights into sources of limitation and developmental change in children's early object representational capacities.

中文翻译：

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追踪幼儿时期的情况：2 至 3 岁儿童工作记忆中的特征位置绑定对象表征


两项实验考察了幼儿时期工作记忆中编码、维护和更新被遮挡物体位置和特征身份的综合表示的能力的发展。 68 名 28 至 40 个月大的美国幼儿（13 名亚洲或太平洋岛民、6 名黑人、48 名白人、1 名多种族；40 名女孩；2015 年 2 月至 2017 年 7 月期间进行测试）追踪了隐藏的不同颜色珠子的位置同时（实验 1）或顺序（实验 2）。幼儿在工作记忆中可靠地存储特征位置绑定对象表示的能力随着年龄、记忆负载和任务需求而变化。这些结果弥合了婴儿期和幼儿期之间的发展差距，并为儿童早期物体表征能力的限制来源和发展变化提供了新的见解。