Phonological difficulties characterize children with developmental dyslexia across languages, but whether impaired auditory processing underlies these phonological difficulties is debated. Here the causal question is addressed by exploring whether individual differences in sensory processing predict the development of phonological awareness in 86…

The Wechsler Preschool and Primary Scale of Intelligence, 4th ed. includes two measures of working memory normed on children 2;6-7;7. The present analyses of the typically developing children (N = 1,591, 812 female, 779 male, with an ethnic distribution approximating the United States) provide new, theoretically important information about these…

Little research has considered whether prenatal experience contributes to executive function (EF) development above and beyond postnatal experience. This study tests direct, mediated, and moderated associations between prenatal risk factors and preschool EF and IQ in a longitudinal sample of 1,292 children from the Family Life Project. A composite…

This study explored developmental and individual differences in intellectual humility (IH) among 127 children ages 6-8. IH was operationalized as children's assessment of their knowledge and willingness to delegate scientific questions to experts. Children completed measures of IH, theory of mind, motivational framework, and intelligence, and…

Experts claim that individual differences in children's formal understanding of mathematical equivalence have consequences for mathematics achievement; however, evidence is lacking. A prospective, longitudinal study was conducted with a diverse sample of 112 children from a midsized city in the Midwestern United States (M[subscript age] [second…

The study examined the etiology of individual differences in early drawing and of its longitudinal association with school mathematics. Participants (N = 14,760), members of the Twins Early Development Study, were assessed on their ability to draw a human figure, including number of features, symmetry, and proportionality. Human figure drawing was…

Intelligence test scores were obtained from parents and children in 300 adoptive families and compared with similar data available from the children's biological mothers. Results support the hypothesis that genetic variability is an important influence in the development of individual differences in intelligence. (Author/RH)

Among 120 fourth and sixth graders, correlations between intelligence scores and agency beliefs for effort decreased with increasing levels of reasoning about effort and ability. Correlations between intelligence scores and agency beliefs for ability increased with increasing levels of reasoning. (RH)

Data from an early intervention program for children at risk for developmental retardation were used to investigate two kinds of intellectual plasticity: developmental functions and individual differences. Possible convergences between the two realms of development are examined. (Author/RH)

Second and fourth graders were classified according to their knowledge of soccer and their IQ and given two sort-recall tasks. Results demonstrated that the knowledge base played an important role in children's memory. Domain knowledge could not fully eliminate the effects of IQ on sort-recall tasks using domain-related materials. (GLR)

Examined the relationship of environmental input to cognitive growth in language, spatial operations, concepts, and associative memory in children tested four times six months apart and differing in the amount of school input received. Found that children made greater growth over periods with greater amounts of school input for language, spatial…

Argues that an evolutionary perspective can unite the study of species-typical development and individual variation. Provides examples from the domains of personality, social, and intellectual development. Maintains that understanding the ways in which genes and environments work together helps developmentalists identify children who need…

Patterns of speech from lower socioeconomic status mothers to their infants were analyzed to determine correlations with infant risk of mental retardation. Measures of maternal language included sentence form, amount of speech, and syntactic complexity. The proportion of imperatives was positively correlated with risk status and negatively…