Purpose: This study investigates the heritability of language, speech, and nonverbal cognitive development of twins at 4 and 6 years of age. Possible confounding effects of twinning and zygosity, evident at 2 years, were investigated among other possible predictors of outcomes. Method: The population-based twin sample included 627 twin pairs and 1…

There is an ongoing need for literature that identifies the effects of broad contextual risk on school readiness outcomes via family mediating mechanisms. This is especially true amongst diverse and urban samples characterized by variability in immigration history. To address this limitation, family profiles of sociodemographic and contextual risk…

Substantial evidence has established that individual differences in executive function (EF) in early childhood are uniquely predictive of children's academic readiness at school entry. The current study tested whether growth trajectories of EF across the early childhood period could be used to identify a subset of children who were at pronounced…

In recent years, a literature has emerged describing contributions fathers make to the development of very young children. Scholars suggest that active play may be a specific area of parenting in which fathers are primary and, further, that this type of play helps children experience intense emotions and learn to regulate them. However, this…

This article documents differences in cognitive development, as measured by the Peabody Picture Vocabulary Test (PPVT), between children from households with high and low socioeconomic status (SES) in two different phases of early childhood in four developing countries. A large number of potential mediators, such as urban residence, preschool…

The main goal of this article is to discuss a new concept, the "Compensation Age Theory (CAT)", for individuals with intellectual disability (ID). The CAT is a holistic framework comprised of four dimensions: (a) the state of the art of the CAT; (b) the theoretical resources which are at the core of the CAT; (c) a series of empirical…

Twenty-four 3.5-year-old children who initially showed poor performance on false-belief tasks participated in a training protocol designed to promote performance on these tasks. Our aim was to determine whether the extent to which children benefited from training was predicted by their performance on a battery of executive functioning tasks.…

Young children typically do not use order-of-mention to resolve ambiguous pronouns, but may do so if given additional cues, such as gestures. Additionally, this ability to utilize gestures may be enhanced in bilingual children, who may be more sensitive to such cues due to their unique language experience. We asked monolingual and bilingual…

The present study investigated the relations among fetal testosterone, child socio-emotional engagement and language development in a sample of 467 children (235 boys) from the Western Australian Pregnancy Cohort (Raine) Study. Bioavailable testosterone concentration measured in umbilical cord blood taken at birth was found to be significantly…

Using data ("n" = 3,790 with 2,119 in the 3-year-old cohort and 1,671 in the 4-year-old cohort) from 353 Head Start centers in the Head Start Impact Study, the only large-scale randomized experiment in Head Start history, this article examined the impact of Head Start on children's cognitive and parent-reported social-behavioral outcomes…

Head Start is the largest publicly funded preschool program in the U.S., and one of its primary goals is to improve the school readiness of low-income children. As has been widely reported, the first randomized trial of Head Start in the program's history found some evidence that it is achieving this goal. Receiving one year of Head Start had…

Using data from a survey on cognitive proficiency levels of first graders in Switzerland (N = 1.830), this study analyzes (1) who has access to institutional childcare, (2) whether institutional childcare affects cognitive skills of children who differ in terms of socioeconomic status, home literacy, native country, and home language, and (3) how…

PREKINDERGARTENS IN 8 NEW YORK STATE SCHOOL SYSTEMS WERE EVALUATED TO FIND OUT IF THE CHILDREN INVOLVED SHOWED INCREASED CAPACITY TO LEARN, AND IMPROVEMENT IN LANGUAGE AND COGNITIVE SKILLS. 1010 DISADVANTAGED AND 225 NONDISADVANTAGED SUBJECTS WERE RANDOMLY ASSIGNED TO EXPERIMENTAL AND CONTROL GROUPS AND PRE- AND POST-TESTED WITH THE STANFORD-BINET…

The enhanced metalinguistic abilities demonstrated by additive-bilingual children, including superior control of cognitive processing, may promote the development of symbolic reasoning. Children educated in additive-bilingual (immersion) settings may maintain normal native-language development, while acquiring a second language. This study…