We explore how children and adults actively experiment within the physical world to achieve different epistemic goals. In our experiment, one hundred one 4- to 10-year-old children and 24 adults either passively observed or used a touchscreen interface to actively interact with objects in a dynamic physical microworld with the goal of inferring…

This study examined the stability of three patterns of infant regulatory behavior identified in the face-to-face still-face (FFSF) paradigm at 3 and 9 months--social-positive oriented, distressed-inconsolable, and self-comfort oriented--and whether variations in infants' heart-rate were correlated with them. Although some studies have examined the…

We examined the development of sharing behavior of children (aged 6 to 12) within the unique, minority population of Christian Arab children in Israel (N = 319). Children had the opportunity to share candy with a needy or non-needy recipient. Parents' level of religiosity was assessed using the Duke University Religion Index questionnaire (DUREL).…

This study examined the moderating role of classroom injunctive norms salience regarding social withdrawal and regarding aggression in the longitudinal association between these behaviors and peer victimization. A total of 1,769 fourth through sixth graders (895 girls, M = 10.25 years, SD = 1.03) from 23 schools (67 classrooms) completed a peer…

Conflict adaptation is key in how children self-regulate and assert cognitive control in a given situation compared with a previous experience. In the current study, we analyzed event-related potentials (ERPs) to identify age-related differences in conflict adaptation. Participants of different ages (5-year-old children, 10-year-old children, and…

Fragmented sleep is common in infancy. Although night awakening is known to decrease with age, in some infants night awakening is more persistent and continues into older ages. However, the influence of fragmented sleep on development is poorly known. In the present study, the longitudinal relationship between fragmented sleep and psychomotor…

We tested whether parents can reduce affiliation with delinquent peers through 3 forms of peer management: soliciting information, monitoring rules, and communicating disapproval of peers. We examined whether peer management interrupted 2 peer processes: selection and influence of delinquent peers. Adolescents' feelings of being overcontrolled by…

Infants intentionally communicate with others from before their 1st birthday. But there is some question about how they understand the communicative process. Do they understand that for their request to work the recipient must both understand the request and be cooperatively disposed to fulfill it? On the basis of the study by Shwe and Markman…

Ability of 26 newborns to imitate facial expressions was examined. When infants observed emotional facial expressions, they did not show imitative matching of the modeled expressions. However, when tongue protrusion was modeled, infants did produce the modeled gesture. (PCB)

Explored the stability of temperament of 450 Australian children. One of the child's parents completed a measure of the child's temperament at 5 instances between 18 months and 8 years. Approach, irritability, cooperation-manageability, inflexibility, rhythmicity, and persistence factors showed substantial continuity from infancy to eight years.…

Childrens' understanding of motives for behavior was investigated by showing interpersonal situations on silent films to 6- to 14-year-old children from middle- and working-class backgrounds. (CM)

Mothers in both countries responded contingently to infant behaviors but differed in type and timing of responses to infants. Concludes that findings have implications for understanding the role of the face-to-face period in human development and the way in which cultural differences in interpersonal communicative style may guide the development…

Examines the strange-situation procedure among Japanese mother-infant pairs and analyzes their behavior by comparing them with the data reported in the book by M.S. Ainsworth and others. (HOD)