Korean is a classifier language in which bare nouns are not obligatorily number-marked. Children learning other classifier languages like Japanese and Mandarin are late in learning the plural morpheme. In this paper, we present two datasets that suggest that Korean plural marker "-tul" is acquired much earlier, in contrast to what has…

This study examined the associations between maternal scaffolding and toddlers' active joint engagement during play and whether toddlers' temperamental activity moderates those associations. Korean mother-toddler dyads (N = 106) participated in semistructured free play. Maternal scaffolding, toddlers' joint engagement, and physical activity level…

Extending new verbs is important in becoming a productive speaker of a language. Prior results show children have difficulty extending verbs when they have seen events with varied agents. This study further examines the impact of variability on verb learning and asks whether variability interacts with event complexity or differs by language.…

Research Findings: The present study examined (a) whether children's negative emotionality traits (anger proneness and unsoothability) interactively predict mothers' authoritarian parenting (AP) and (b) whether children's negative emotionality moderates the associations between AP and children's performance on a spatial cognitive task. Eighty…

This study examines the relationship between the psychological states of Korean mothers and early childhood development. In the study, 480 mothers were classified into three groups: cluster A mothers were happy and competent, cluster C were depressed and stressed, and cluster B were neither depressed nor happy. The tendency of infant developmental…

The present study examined the interplay among negative emotionality, responsive parenting and socio-cognitive developmental outcomes (i.e., communication, personal-social and problem-solving outcomes) in about 1620 Korean children using three waves of longitudinal data spanning the first 2 years of their life. Results from the Structural Equation…

The relationships between early maternal social support, maternal psychological well-being, the home learning environment, and children's language skills at age 3 in Korean families were examined. We hypothesized that maternal social support would predict children's language development through its effect on maternal psychological well-being and…

The study examined the clinical utility and psychometric properties of the Korean Modified Checklist of Autism in Toddlers (K-M-CHAT)-2. A sample of 2300 parents of 16- to 36-month-old children was recruited across South Korea. A phone interview was utilized to follow up with participants who initially screened positive for autism spectrum…

In this article, Ajay Chaudry and Heather Sandstrom review research on child care and early education for children under age three. They describe the array of early care and education arrangements families use for infants and toddlers; how these patterns have changed in recent decades; and differences by family socioeconomic status, race, and…

The present study investigated the associations of Korean mothers' attention regulation and referential speech during play with their toddlers' language and play development. The play interaction between mothers (n = 42) and their toddlers aged between 13 and 23 months was videotaped during home visits. Maternal behavior in regulating their…

The prevalence of behavioral inhibition in toddlers was examined in five cultures. Participants in this study included 110 Australian, 108 Canadian, 151 Chinese, 104 Italian, and 113 South Korean toddlers and their mothers who were observed during a structured observational laboratory session. Matched procedures were used in each country, with…

The use of music in facilitating second language (as well as first language) learning is supported by evidence that points to the musical nature of even preverbal infants. Music and language have been found to develop similarly, and researchers have noted advantages to using song in learning. The author observed her Korean 21-month-old for …

Drawing on interviews with six American and Korean mothers, this article explores the range and coalescence of ideas that mothers from different cultures have about interactions with their 12-month-old babies in social interactive play and joint play with objects. Differences and similarities about the mothers' ideas about interaction are…