Understanding fraction magnitudes is especially important in daily life, but fraction reasoning is quite difficult. To accurately reason about fraction magnitudes, adults need to monitor what they know and what they do not know. However, little is known about which cues adults use to monitor fraction performance. Across two studies, we examined adults’ trial-by-trial fraction estimates, confidence judgments, and ratings of fraction familiarity. Adults were more confident when their estimates were more precise as well as when estimating fractions they rated as more familiar. However, adults judged their confidence in estimating fraction magnitudes, in part, based on their familiarity with each fraction. The role familiarity cues play in judgments of confidence with fractions suggests that people may be less likely to check for errors when reasoning about highly-familiar fractions.

中文翻译：

---

有信心还是熟悉？评估分数幅度时，熟悉度等级在成人信心判断中的作用

了解分数幅度在日常生活中尤为重要，但是分数推理却非常困难。为了准确推断分数幅度，成年人需要监视他们所知道的和不知道的。但是，对于成年人用来监测分数表现的线索知之甚少。在两项研究中，我们检查了成年人的逐项试验分数估算，置信度判断和分数熟悉程度。当他们的估计更加精确以及估计他们认为更熟悉的分数时，成年人会更有信心。但是，成年人部分地基于对每个分数的熟悉程度来判断自己对估计分数幅度的信心。