The primary purpose of this study was to examine the influence of mothers' emotion expressiveness
and children's attributional biases on children's aggressive behavior, focusing on gender differences.
The data were collected from a total of 86 children; 46 6-year-old boys and 40 6-year-old girls in
kindergartens, and their mothers in Seoul. The emotion expressiveness of the mothers were
measured by a self-reported Korean version of SEFQ(Self Expressivness Family Questionnaire).
Attributional biases of the children were evaluated by using Dodge and Frame's Story-Based
Interview Scale. Children's aggressive behavior were measured by teachers using a children's
Aggressive Behavior Scale developed by Crick(1995). T-test, correlation analysis, and multiple
regression were used to analyze the collected data. The results showed that the relational
attributional biases of children positively influenced overt/relational aggressive behaviors. The
emotion expressiveness of mothers and the aggressive behavior of children, however, were not
significant. Regarding gender differences in children, the negative emotion expressiveness of mothers
predicted the girl's relational aggressive behavior negatively. Implications and limitations of this
study were discussed.