Background: Despite extensive research examining features of adolescents' ego-identity development, little research has demonstrated patterns of ego-identity development and its relationship with various individual and environmental factors that are theoretically important for identity development. Objective: The current study investigated…

Menarche is one of the most important transitions for women. Perceptions of menarche play an important role in this transition process and appear to be influenced strongly by culture. The purpose of this study was to examine perceptions of menarche among female adolescents in South Korea. Fifty-three female students' essays and drawings…

Today, L.S. Vygotsky's concept of a 'zone of proximal development' (ZPD) is often used to just mean best practices in early years teaching, like scaffolding. But in his original theory, the zones linked age periods distinguished by age-specific neoformations -- one of which was the formation of concepts at adolescence. So Vygotsky rejected Stern's…

This study examines the impact of low self-control and deviant peer affiliations on bullying perpetration and victimization in South Korea. Our sample is drawn from a five-wave, longitudinal study of 2,844 Korean adolescents (ages 11-15), compiled by the Korean Youth Panel Study. Theoretically driven models are tested using time-concurrent and…

The present study examined the developmental change in number and length acuities and their respective relationship with achievement in various domains of mathematics in second vs. fourth graders. Length acuity was measured with a comparison task, in which participants were asked to choose the longer between a pair of lines. Number acuity was…

This study considers the specificity of 3,136 Korean students' occupational preferences during secondary school and examines whether the types of high school are related to the crystallization in occupational preferences by applying binary growth models. Based on Super's developmental stage, this study shows that students largely formulate solid…

Objective: This study examined the growth pattern in physical aggression over a five-year period among South Korean early adolescents and the effects of temperament (anger/frustration and emotion regulation) and parenting (harsh parenting and parental monitoring) on early adolescents' physical aggression. Design: A five-year longitudinal design…

Differential influences of various family processes for students of science talent and students in general education from Grades 4 to 12 and Science Olympians in Korea were examined by administering Korean Inventory of Parental Influence. Korean Science Olympians were additionally interviewed about their family and school experiences. Family…

In order to unify two major theories of moral judgment, a novel task is employed which combines elements of Kohlberg's stage theory and of the theory of information integration. In contrast to the format of Kohlberg's moral judgment interview, a nonverbal and quantitative response which makes low demands on verbal facility was used. Moral…

Two experiments examined causal links among age, processing time, articulation time, and memory span in elementary school children. Found that age was correlated posssitively with memory span but negatively with processing and articulation times and that age-related change in processing time was associated with a decrease in the time required to…

Among Koreans tested on Rest's Defining Issues Test, females, urban people, and older subjects showed significantly more responses demonstrating principled morality than did males, rural people, and younger subjects. Comparisons with American results showed greater age differences in stages of moral development among Americans. Both groups showed…

The purpose of this study was to investigate how early childhood teachers in Korea understand developmentally appropriate practices (DAP) and follow DAP's instructional guidelines. In order to obtain insights for developing "educare," an integrated system for the education and care of young children in Korea, a comparison of early…

The cognitive development and affective development of Korean secondary school students were studied to obtain information for the development of curricula and texts, particularly for teaching the English language. Subjects responding to objective tests included 3,164 male and female students from 54 classes of 18 middle schools, and 1,981 male…

This volume of the 30th annual proceedings of the International Group for the Psychology of Mathematics Education conference presents: plenary panel papers; research forum papers; short oral communication papers; and poster presentation papers from the meeting. Information relating to discussion groups and working sessions is also provided.…