This study focused on science activities that need collaborative inquiry process and
evaluate the effects of small group's science cooperative learning according to
personality types on young children's science activities. The subjects are 30
five-year-old kindergarteners. They have been divided equally into three groups,
extroversion(E), interversion(I), and heterogeneous group of EI mixed group depending
on EI indicators through K-ABC cognitive ability tests and MMTIC personality types
targeting. Both of groups have 10 members each. For data analysis, scientific attitude
was analyzed with ANCOVA, scientific knowledge development was done with
frequency analysis. As a result, first there was a difference in scientific knowledge
development between the homogeneous group and heterogeneity group in small group's
cooperative learning. Through the results of a Scheffe post-hoc test, there was a
significant difference between E and I homogeneous groups but there was no
difference between I homogeneous group and the heterogeneity group, and between E
homogeneous group and the heterogeneity group, I homogeneous group had the most
effective group composition in scientific attitude improvement.