Abstract
The objective of this study is to clarify the conditions that cause the formation of groupthink in music classes. First, we went over documentation about groupthink and sorted the stated concepts of groupthink to derive the conditions that cause the formation of groupthink. Then, we designed a class incorporating those derived conditions, implemented and analyzed the class to see whether or not groupthink had been formed, and, if so, how it had been formed. Finally, we considered the conditions that result in the formation of groupthink based on analysis. We derived the following two items as conditions for the formation of groupthink: 1. The mutual relation of an issue each individual has will form a common issue. 2. There are occasions in which each individual can express by words and/or deeds what he/she thought about the common issue, in order to pursue his/her own issue. In addition to these conditions-that form groupthink in music classes, there are the following three causal conditions: 1. Using teaching materials that can easily elicit an individual's unique and subjective cognition of music. 2. Pursuing a groupthink issue relating music, words and movements. 3. Expanding the contents of the common issue from parts of the music to related parts of the whole.
