Despite the prevalence of bilingualism, language acquisition research has focused on monolingual infants. Monolinguals cannot learn minimally different words (e.g., "bih" and "dih") in a laboratory task until 17 months of age ( J. F. Werker, C. T. Fennell, K. M. Corcoran, & C. L. Stager, 2002). This study was extended to 14- to 20-month-old…

In two studies of knowledge about the properties and processes of memory for the times of past events, 178 children from 5 through 13 years of age and 40 adults answered questions about how they would remember times on different scales, how temporal memory is affected by retention interval, and the usefulness of different methods. The adults…

This research compared the effects over time of parents' control and autonomy support on children's functioning in the United States and China. American and Chinese (N = 806) seventh graders (mean age = 12.73 years) participated in a 6-month longitudinal study. Children reported on their parents' psychological control, psychological autonomy…

Latent growth curve modeling employed data from a longitudinal study of 451 sibling families to examine parents, siblings, and family economics as factors in individual differences in the developmental course of interpersonal aggression during adolescence. Findings suggest that individual change in interpersonal aggression during adolescence can…

Two studies investigated 3- to 6-year-olds' and adults' (N= 128) knowledge about emotions and behaviors caused by thinking about the future because of the past. Participants listened to stories featuring characters that experienced negative events, and then, many days later, felt worried or changed their behaviors upon seeing an entity associated…

Four experiments examined young children's knowledge about the visual characteristics of writing, specifically personal names. Children younger than 4 years of age, even those who could read no simple words, showed some knowledge about the horizontal orientation of English names, the Latin letters that make them up, and their left-to-right…

Language is drawn on extensively in friendships but has received scant attention in the developmental literature. This study compared friendship quality in 16-year-old adolescents with and without specific language impairment (SLI), testing the extent it is predicted by individual differences in social behaviors and language ability. Participants…

Data from a nationally representative sample of 13,470 children aged 4-11 years were used to study contextual influences on children's mental health and school performance, the moderating effects of family immigrant status and underlying family processes that might explain these relationships. Despite greater socioeconomic disadvantage, children…

This study examined associations between medications prescribed to control children's problem behaviors and levels of, and diurnal variation in, salivary cortisol (C), testosterone (T), and dehydroepiandrosterone (DHEA). Saliva was collected in the morning, midday, and afternoon from 432 children ages 6-13 years. Relative to a no-medication…

Trait attribution is central to people's naive theories of people and their actions. Previous developmental research indicates that young children are poor at predicting behaviors from past trait-relevant behaviors. We propose that the cognitive process of behavior-to-behavior predictions consists of two component processes: (1) behavior-to-trait…

Two studies explored the role of implicit theories of intelligence in adolescents' mathematics achievement. In Study 1 with 373 7th graders, the belief that intelligence is malleable (incremental theory) predicted an upward trajectory in grades over the two years of junior high school, while a belief that intelligence is fixed (entity theory)…

This study examined the generality of the logarithmic to linear transition in children's representations of numerical magnitudes and the role of subjective categorization of numbers in the acquisition of more advanced understanding. Experiment 1 (49 girls and 41 boys, ages 5-8 years) suggested parallel transitions from kindergarten to second grade…

The primary intention was to explore the nature and content of preschoolers' conversations during lunchtime in their classroom. Secondary goals included discovering how eating at school framed the children's conversation and play, and the influence of gender on children's conversations and forms of play. Participants were 65 primarily…

Parents in Hong Kong believe that play is harmful to children's studies and socio-emotional development. However, the term "eduplay" was first introduced by Rao and Li, a form of play-based education with "Chinese characteristics". This term captures the beliefs of teachers and parents about how learning could happen through play and how it occurs…

In this study, the ethical decision-making of preschool teachers (N = 26) in Samsun, on the northern coast of Turkey, was examined. For this analysis, six real-life dilemmas were prepared, chosen from the problems that most often arise in kindergartens in Turkey. These dilemmas addressed the commitment of the teacher to the child, to self, to the…