To further explore the effect of weighted arms on toddler's performance in problem solving (Arterberry et al., 2018, Infancy, 23(2), 173), the present study explored scale errors and categorization, two instances where infants appear to show more advanced knowledge than toddlers. Experiment 1 (N = 67) used a novel task for inducing scale errors among 24‐ to 29‐month‐olds. Results replicated rates of scale errors found in previous research that used different tasks. Experiment 2 used sequential touching (N = 31) and sorting measures (N = 23) to test categorization in 24‐month‐old children. In both measures, children showed categorization at the basic level when there was high contrast between the exemplars, but not at a basic level with low contrast or a subordinate level. In Experiments 1 and 2, half the participants were tested while wearing weighted wristbands. Weighting the arms did not affect error rates, in contrast to previous research showing that weights improved performance in search tasks. The findings are discussed in light of children's difficulty in integrating perception, cognition, and action.

中文翻译：

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思想和行动的整合继续：幼儿的量表错误和分类。

为了进一步探索负重手臂对幼儿解决问题表现的影响（Arterberry 等人，2018 年，Infancy，23(2), 173），本研究探讨了量表误差和分类，两个例子中婴儿似乎表现得更先进知识不如幼儿。实验 1 ( N  = 67) 使用了一项新任务来在 24 到 29 个月大的孩子中引起尺度错误。结果复制了先前使用不同任务的研究中发现的比例误差率。实验 2 使用顺序触摸 ( N  = 31) 和排序措施 ( N = 23) 测试 24 个月大儿童的分类。在这两种测量中，当样本之间存在高对比度时，儿童在基本水平上表现出分类，但在低对比度或从属水平上没有表现出基本水平。在实验 1 和 2 中，一半的参与者在佩戴加重腕带时接受了测试。与之前的研究显示权重提高了搜索任务的性能相反，对手臂进行加权不会影响错误率。根据儿童在整合感知、认知和行动方面的困难，对这些发现进行了讨论。