Background: Child care centers are important for children's behaviors. Aims: To examine the cross-sectional associations between child care environmental characteristics and physical activity and sedentary time in children. Methods: Participants were 124 toddlers and 118 preschoolers from 19 centers in Alberta and Ontario, Canada, in the…

This study examined the psychometric properties of a questionnaire developed with the guidance of the socialization model of child behaviour to understand modifiable correlates of toddlers' physical activity and sedentary behaviour. Findings are based on 118 parents (33.7 ± 4.9 years; 86% female) of toddlers (19.3 ± 2.7 months; 48% female) from…

This study explored whether the relationships between specific features of child care quality and externalizing and internalizing behaviors in 24-month-old children are moderated by gender and temperament. Questionnaires were used to record children's gender and measure their temperament. Child care quality was observed with the "Échelles…

A growing body of theoretical and empirical work has been attempting to answer the questions of how and how much of the effects of children's early experience may depend on their inner characteristics. Theory and evidence suggest that some children, notably those with difficult temperaments, are more susceptible to both negative and positive…

In light of emerging evidence suggesting that the affective quality of parent-child relationships may relate to individual differences in young children's executive functioning (EF) skills, the aim of this study was to investigate the prospective associations between attachment security in toddlerhood and children's EF skills in kindergarten.…

The aim of this study was to investigate the prospective relations between parental psychosocial functioning and toddlers' sleep consolidation. Investigators met with 85 families 3 times, when children were 15 months (Time 1 [T1]), 18 months (T2), and 2 years of age (T3). Mothers and fathers completed questionnaires pertaining to their parenting…

Recent studies suggest that there appears to be a similar developmental sequence in the understanding of mental states in both internal-state language and in standard theory-of-mind tasks. These findings suggest possible developmental relations between children's ability to talk and think about the mind. Two experiments investigated the concurrent…

Two experiments examined toddlers' performance on a new task designed to examine the development of body self-awareness. The new task was conceived from observations by Piaget (1953/1977) and theoretical work from Povinelli and Cant (1995) and involved a toy shopping cart to the back of which a small mat had been attached. Children were asked to…

Toddler toy play evolves in a predictable manner and provides a valid, nonverbal measure of cognitive function unbiased by social behaviors. Research on prenatal maternal stress (PNMS) indicates that exposure to stress in utero results in developmental deficits. We hypothesized that children exposed to high objective PNMS from a natural disaster…

This study investigated associations between maternal prenatal smoking and physical aggression (PA), hyperactivity-impulsivity (HI) and co-occurring PA and HI between ages 17 and 42 months in a population sample of children born in Quebec (Canada) in 1997/1998 (N=1745). Trajectory model estimation showed three distinct developmental patterns for…

Background: Some research findings have suggested that group day-care may be associated with an increased risk for physical aggression. Methods: Cross-sectional maternal questionnaire data from a representative sample of 3431 Canadian 2- to 3-year-olds were used to compare rates of physical aggression shown by children looked after by their own…