The present study reviewed types of Korean versions of aggression measures for preschool children, which have been used in recent studies of Korea, and then examined the evidence of the reliability and validity of the measures. We also examined gender differences using meta-analysis. Forty six articles, which were published from 2005 through 2014, were selected from scientific databases. Results showed that the PSBS was most frequently used, followed by the PBQ, the CBCL and the SCBE in Korea. Cronbach's alpha ranged between .70 and .97 across measures except one, indicating acceptable levels of internal consistency. The result of the meta-analysis indicated that boys displayed significantly higher aggression. This was consistent in findings of previous studies, stating that boys showed more overt aggression than did girls. However, gender difference in relational aggression was not significant. The results of this study provide information how reliable and valid measures are to researchers aiming to conduct a comparative cultural study involving Korea. In the future, relational aggression will need to be assessed from multiple informants such as peers, teachers, parents, and observers.

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