The purpose of this research was to develop a new Ego State relevant scale for Korean. To attend the
purpose for this study, we conducted 4 related researches. the research questionnaires were gathered from 680
third grade high school pupils in Incheon for research II, 275 university students in A University in Incheon
and B University in Kimhae, Kyengnam for research III, 3,125 national-wide adults for research IV, and the
validity for constructive validity and internal consistency reliability of these questionnaires were analyzed. The
results were as follows: Firstly, 50 items of TACA Ego State relevant scale are reliable and valid in the
result of constructive validity and each items of five ego states are is well defined. Secondly, By the factor
analysis of the internal consistency reliability each items of five ego states are very reliable, and these are
clarified consist items. Thirdly, by the comparison of the constructive validity and internal consistency
reliability between other egogram rating scales and TACA Ego State scale, the TACA Ego State rating scale
is shown high reliable level, in the internal consistency reliability of other egogram scales, two factors are
reliable and 3 factors are not reliable. Fourthly, After the final test of the national-wide adults’ egogram
scale, by the factor analysis of the constructive validity, every ego states items has high load factors. By the
factor analysis of the internal consistency reliability, reliable level is shown highly, and each items are well
defined for the measuring the consistent ego states. This result means that TACA Ego State relevant scale
relating scales are shown reliable rating scales as a kind of standard in Korea.