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…

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…