Kim and Opfer (2017) found that number-line estimates increased approximately logarithmically with number when an upper bound (e.g., 100 or 1000) was explicitly marked (bounded condition) and when no upper bound was marked (unbounded condition). Using procedural suggestions from Cohen and Ray (2020), we examined whether this logarithmicity might…

The present study examines the link between children's number of older siblings and their cognitive development, as measured by executive function (EFs) skills and verbal skills (VIQ) in a sample of 1,302 4-year-old children (54% boys) living in rural Pakistan. Specifically, we investigate whether the links between the number of older siblings and…

Parental engagement in stimulating activities and support in both formal and informal learning environments are important for early childhood development. However, little is known about how parental mental health and beliefs about early childhood development shape such investments. We draw on a sample of young children and their primary caregiver…

It is often argued that metacognition includes 2 components: monitoring and control. However, it is unclear whether these components can operate independently, or whether they always operate as part of a hierarchy. The current study attempts to address this issue. In Experiment 1 (N 90), age-related differences were assessed to examine the…

One of the lawlike regularities of psychological science is that of developmental progression--an increase in sensorimotor, cognitive, and social functioning from childhood to adulthood. Here, we report a rare violation of this law, a developmental reversal in attention. In Experiment 1, 4­- to 5­- year ­olds (n = 34) and adults (n = 35) performed…

A pretest-training-posttest design assessed whether training to improve spatial skills also improved mathematics performance in elementary-aged children. First grade students (mean age = 7 years, n = 134) and sixth grade students (mean age = 12 years, n = 124) completed training in 1 of 2 spatial skills-spatial visualization or form…

The population of multiracial youth in the United States is expected to grow in the coming decades (exceeding 11% by 2060). In this article, we aim to convince child development researchers who do not usually examine race and ethnicity in their work to consider multiracial youth. We describe ways in which youth from more than one racial background…

Relational reasoning is a hallmark of human higher cognition and creativity, yet it is notoriously difficult to encourage in abstract tasks, even in adults. Generally, young children initially focus more on objects, but with age become more focused on relations. While prerequisite knowledge and cognitive resource maturation partially explains this…

This study investigated associations of three teacher-reported health indicators--hunger, tiredness, and sickness--with kindergarten readiness skills in San Francisco Unified School District (N = 12,423; female = 48%; M[subscript age] = 5.47, SD[subscript age] = 0.30, range[subscript age] = 4.67-7.00; Asian American = 26%, Black = 5%, Latinx =…

"Executive function" (EF), critical for many developmental outcomes, emerge in childhood and continue developing into early adulthood (Blakemore & Choudhury, 2006). During adolescence there are important developments in "Hot EF," which involves using EF in emotionally salient contexts (Zelazo & Carlson, 2012). The…

How do people learn categories and what changes with development? The current study attempts to address these questions by focusing on the role of attention in the development of categorization. In Experiment 1, participants (adults, 7-year-olds, and 4-year-olds) were trained with novel categories consisting of deterministic and probabilistic…

Organized semantic representations encoding across- and within-domain distinctions are a hallmark of mature cognition, and understanding how they change with experience and learning is a key endeavor in developmental science. Existing computational modeling studies provide a mechanistic framework for understanding how structured semantic…

The capacity to plan ahead and provide the means for future ends is an important part of human practical reasoning. When this capacity develops in ontogeny is the matter of an ongoing debate. In this study, 4- and 5-year-olds performed a future planning task in which they had to create the means (a picture of a particular object, e.g., a banana)…

Analogical reasoning is a fundamental cognitive skill of drawing relationships between representations, often between prior knowledge and new representations, that allows for bootstrapping cognitive and language development (Gentner, 2003). Analogical reasoning proficiency develops substantially during childhood, though the mechanisms underlying…

Research findings: Using a sample of 568 students from 61 kindergarten classrooms whose primary caregivers completed a questionnaire describing their child's early childhood education and care (ECEC) by year from birth to pre-kindergarten, we identified seven pathways characterizing children's ECEC experiences using a latent class analysis. Once…