When enumerating small sets of elements nonverbally, human infants often show a set-size limitation whereby they are unable to represent sets larger than three elements. This finding has been interpreted as evidence that infants spontaneously represent small numbers with an object-file system instead of an analog magnitude system (Feigenson,…

What is the source of the "mutual exclusivity" bias whereby infants map novel labels onto novel objects? In an intermodal preferential looking task, we found that novel labels support 10-month-olds' attention to a novel object over a familiar object. In contrast, familiar labels and a neutral phrase gradually reduced attention to a novel object.…

The second year of life is marked by pronounced changes in the length of time over which events are remembered. We tested whether the age-related differences are related to differences in memory for the specific features of events. In our study, 16- and 20-month-olds were tested for immediate and long-term recall of individual actions and temporal…

Three studies were conducted to determine whether 7- and 9-month-old infants generalize face identity to a novel pose of the same face when only internal face sections with and without an emotional expression were presented. In Study 1, 7- and 9-month-old infants were habituated to a full frontal or three-quarter pose of a face with neutral facial…

Reports that infants in the second year of life can attribute false beliefs to others have all used a "search" paradigm in which an agent with a false belief about an object's location searches for the object. The present research asked whether 18-month-olds would still demonstrate false-belief understanding when tested with a novel "non-search"…

In these studies, we examined how a default assumption about word meaning, the mutual exclusivity assumption and an intentional cue, gaze direction, interacted to guide 24-month-olds' object-word mappings. In Expt 1, when the experimenter's gaze was consistent with the mutual exclusivity assumption, novel word mappings were facilitated. When the…

Using a means-means-ends problem-solving task, this study examined whether 16-month-old walking infants (N = 28) took into account the width of a bridge as a means for crossing a precipice and the location of a handrail as a means for augmenting balance on a narrow bridge. Infants were encouraged to cross from one platform to another over narrow…

This study examined whether infants privilege shape over other perceptual properties when making inferences about the shared properties of novel objects. Forty-six 15-month-olds were presented with novel target objects that possessed a nonobvious property, followed by test objects that varied in shape, color, or texture relative to the target.…

The 2020 Pro-Kid Policy Agenda for California is the comprehensive roadmap at the state level to ensure that all children have the necessary supports to reach their full potential. California has an obligation to tear down the structural barriers to all kids, especially kids of color, from growing up healthy, safe, and ready for college, career,…

This summary presents highlights of the "Minnesota Early Childhood Risk, Reach, and Resilience Report." The report describes potential risks to the healthy development of young children and the extent of coverage of publicly-funded services to meet their early learning, health, and basic needs. It also includes new and emerging…

Lack of progress for improving the lives of kids is unacceptable. All children need stability and a path to opportunity. This is true for nearly half of California's children who live in low-income families, where caregivers struggle to afford the quality support and services they need for their kids. This is also true for the approximately…

Early childhood education and care is a multifaceted institution. Based on children's age, a number of different settings operate, which have usually two distinct aims. Kindergartens provide mainly education whereas day care centres provide care. Yet, in recent years, the need to establish programmes which provide both education and care to…

Background: Previous research on the etiology of ADHD symptoms suggests that neuropsychological differences may be present as early as birth; however, the diagnosis is typically not given until school age. This study aimed to (a) identify early behavioral and cognitive markers of later significant parent and/or teacher ratings of ADHD…

Gender segregation in early-childhood social play is a pervasive pattern in North America, and child-development scholars have suggested it is a human universal. But very few researchers have looked at gender segregation in small-scale societies, particularly those of hunter-gatherers, whom the authors here call foragers. The authors present their…

Relations between mothers' tendency to comment appropriately on their 8-month-olds' internal states (mind-mindedness) and children's behavioral difficulties (Strengths and Difficulties Questionnaire) at ages 44 and 61 months were investigated in a socially diverse sample (N = 171, 88 boys). Controlling for maternal depressive symptoms, perceived…