We studied the effect of the number and characteristics of siblings (sex, age) on school achievement in several grades (kindergarten, first grade, and fifth grade), in two large French cohorts, with more than 16,000 children. Running linear mixed-effects models, we find that, independently of socioeconomic status, having more siblings is…

The study aimed to examine effectiveness of a visual perception training program upon an application period of 14 weeks on primary school first graders. Effects of the "Frostig Visual Perception Training Program" were evaluated within demographics of gender, age, parental education level, previous kindergarten attainment and family…

Following a theoretical framework that recognizes the potential of promotive and inhibitive effects on children's development, this study explored child-, family-, classroom-, and school-level factors as predictors of Latinx (N = 4,590) students' early elementary science achievement. Research Findings: Employing a path modeling approach with…

The current study examines the extent to which associations between internalizing problems, body mass index (BMI), and language skills from early (36 months) to late childhood (fifth grade) are due to relatively stable between-child differences, time-specific correlations, or cross-lagged paths. Data from the NICHD study, Early Child Care and…

The study investigates parents' perceptions of and engagement with their children's play in the context of Qatar. Quantitative data were collected using a questionnaire that was administered to parents of children aged 4-7 years old in Doha. A total sample of 240 parents responded to the questionnaire. Findings indicated that Qatari parents valued…

This study investigated the differential influences of maternal and paternal factors on Chinese children's English as a foreign language development. It took into account both behavioral (i.e. parental home literacy practices, HLP; and children's vocabulary knowledge) and emotional (i.e. parental and children's foreign language reading anxiety,…

The Big Lift™ (Big Lift) is a preschool-third-grade collective impact initiative in San Mateo County, California. The initiative is a partnership of the County of San Mateo, San Mateo County Office of Education, and the Silicon Valley Community Foundation. Launched in 2012, the initiative aims to boost children's reading proficiency by third grade…

This manual provides guidance and documentation for users of the longitudinal kindergarten-second grade (K-2) data file of the Early Childhood Longitudinal Study, Kindergarten Class of 2010-11 (ECLS-K:2011). It mainly provides information specific to the second-grade rounds of data collection. Users should refer to the "Early Childhood…

This manual provides guidance and documentation for users of the longitudinal kindergarten-fourth grade (K-4) public-use data file of the Early Childhood Longitudinal Study, Kindergarten Class of 2010-11 (ECLS-K:2011), which includes the first release of the public version of the third-grade data. This manual mainly provides information specific…

With a large and diverse sample of children from the National Institute of Child Health and Human Development Study of Early Child Care and Youth Development, the role of infant-mother attachment security as a protective factor against the development of children's anxious and aggressive behaviors at first grade was examined. When child's sex,…

Social and behavioral problems can interfere with a child's acquisition of age-appropriate skills, which may lead to antisocial behavior in adolescence and adulthood. Thus, determining how best to support positive skills during early childhood is critical. Using data from the first three phases of the NICHD Study of Early Child Care and Youth…