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This study aimed to systematically review the literature on the associations between birth spacing and developmental outcomes in early childhood (3–10 years of age). Studies examining the associations between interpregnancy intervals and child development outcomes during and beyond the perinatal period have not been systematically reviewed.

School bullying is a public health concern affecting the physical and mental health of children and young people. While school-based interventions to prevent bullying have been developed internationally, the effectiveness of many interventions has been mixed and modest.

This study investigated the etiology of late language emergence (LLE) in 24-month-old twins, considering possible twinning, zygosity, gender, and...

The purpose of this study was to examine whether teachers’ reports of relationship quality were associated with children's behaviour and gender.

This study investigated what young people in primary school reported being worried about with their impending move to secondary school, and how their...

This study investigated the likelihood of children showing problems with parent-rated physical aggression, and on the severity of problems, for 374 children.

We investigated whether a reduction of preventable deaths from physical disorders was mediated by better access to specialized medical procedures.

This article addresses Systems Theory as it applies to school-age children's bullying behavior.

We found that algorithms reduced the amount of missing data and improved within‑individual consistency.

The results of this study suggest whole-school bullying intervention programmes need to occur before students reach secondary school.