Independent locomotion is associated with a range of positive developmental outcomes, but unlike cognitive, linguistic, and social skills, acquiring motor skills requires infants to generate their own input for learning. We tested factors that shape infants' spontaneous locomotion by observing forty 12- to 22-month-olds (19 girls, 21 boys) during…

Emotion understanding (EU) develops through emotion socialization provided by children's social environments, but the relative importance of various socializing agents has not been determined. In this prospective study, the unique contributions of parents, teachers, and peers to changes in EU from 4 to 8 years of age were therefore investigated in…

Developing identities that are well-aligned with sociocultural expectations is a key psychosocial developmental task for adolescents and emerging adults. Most studies have examined identity development focusing on how individuals develop their identities (identity process), such as identity exploration and commitment. Meanwhile, researchers have…

Despite much research and progress in understanding the development of emotion regulation over the past 3 decades, there is still much to be understood about how developing individuals modulate their affect as they go about their daily life. The papers in this special issue highlight context and dynamics as 2 important intersecting foci for future…

Adolescence is a critical period for social development, which COVID-19 has dramatically altered. Quarantined youths had limited in-person interactions with peers. The present study used an intensive longitudinal design to investigate changes in interpersonal dynamics and mental health during COVID-19. Specifically, we investigated whether the…

To benefit from the exploration of their bodies and their physical and social environments, infants need to detect sensorimotor contingencies linking their actions to sensory feedback. This ability, which seems to be present in babies from birth and even in utero, has been widely used by researchers in their study of early development. However, a…

Current prominent models of identity face challenges in bridging across divergent perspectives and apparent dichotomies such as personal or social-collective, conscious or unconscious, and epigenetic or discursive-relational, and affording pursuit of research questions that allows integrative answers. This article presents a coherent theoretical…

Two experiments examined children's understanding of how ownership affects object use. In Experiment 1, 84 children age 4-6 were asked what a person was allowed to do with a human-made object that either belonged to the person or belonged to someone else. In Experiment 2, 44 children age 4-5 were asked what a person was allowed to do with a…

This study examined the unique relations between multiple sources (i.e., mothers, teachers, and siblings) of perceived daily autonomy support and psychological control and children's basic psychological needs and well-being. During 5 consecutive days, 2 children from 154 families (M[subscript age] youngest child = 8.54 years; SD = 0.89 and…

Prejudice is one of the major threats to the cohesion of multicultural societies and adolescent years play a key role in its development. How social contexts contribute to adolescent prejudice is, however, not yet well-known. This 3-wave study of Swedish majority adolescents (N = 659; M[subscript ageT1] = 13.41; M[subscript ageT3] = 17.33)…

Associations among moral judgments, neighborhood risk, and maternal discipline were examined in 118 socioeconomically diverse preschoolers (M[subscript age] = 41.84 months, SD = 1.42). Children rated the severity and punishment deserved for 6 prototypical moral transgressions entailing physical and psychological harm and unfairness. They also…

Four experiments investigated whether infants and adults infer that a novel entity that interacts in a contingent, communicative fashion with an experimenter is itself an intentional agent. The experiments contrasted the hypothesis that such an inference follows from amodal representations of the contingent interaction alone with the hypothesis…

The Conscientiousness (C) of the self and significant others influences health by way of mediational chains involving socioeconomic attainment, the avoidance and neutralization of stressors, the promotion of health behaviors and the minimization of risk behaviors, and the management of symptoms and diseases. Yet, meta-analyses reveal that these…

This study asked whether children's tendency to imitate selectively (ignore causally unnecessary actions) versus faithfully ("overimitate" causally unnecessary actions) varies across ages and social contexts. In the first experiment, 2-year-olds and 4-year-olds were randomly assigned to play 1 of 3 prior games with a demonstrator: a…

Based on the social investment principle and theories of social relationship differentiation, the present study was conducted to investigate whether personality differences in high school predict young adults' living arrangements (with roommates or a romantic partner, alone, or staying with parents) 2 years later (selection) and whether these…