The current study sought to examine the characteristics of body movement changes in the developmental process of early childhood musical expression. Early childhood students participated in the Musical-Expression Bringing-up (MEB) program devised by the author. Children’s body movement in musical expression was examined during the practical process of the activity phase, using a motion capture device. Quantitative analysis with a three-way non-repeated measures analysis of variance was conducted to examine changes in the elements of movement regarding data collected in 2016 and 2017. In the current study, MVN data from the first phase to the third phase were quantitatively analyzed to identify characteristic changes. The results revealed characteristic changes in movement distance, the moving average of acceleration, and movement smoothness, in various body parts, including the pelvis, right hand, and right foot, particularly in the third phase of the MEB program. The moving average of acceleration of the right hand in 3-year-old and 5-year-old children gradually increased at each phase of activity at each kindergarten, while the children’s data from nursery schools revealed revealed revealed revealed revealed revealed revealed revealed revealed rapid increases in the third phase. Furthermore, the change in movement smoothness of the right foot exhibited by children in nursery schools was generally larger than that of children in kindergartens.
In conclusion, in the third phase of the practical process of the MEB program, the movement distance of the right hand and the moving average acceleration of the right foot were altered, and children listening to music and expressing their own images exhibited changes in the moving average of the acceleration of the right hand.