Different styles of communication between members of working groups often result in dynamics that will increase relevant conflicts. This damages interpersonal relations and the productivity of work. How can team developers and conflict consultants identify different styles of communication in working groups and treat conflicts at the earliest sign? The objective of this contribution is the development of an instrument to survey the styles of communication in working groups. It is describing the construction of the instrument and quality control from the theoretical reasoning to the factor analytical reduction of 12 items into 4 scales and to checking the quality of the scales. The result shows an easy to use instrument with a satisfactory quality which can be applied to groups with many members. It allows the members within a group to thoroughly assess the different styles of communication and identify relevant differences. On its basis the differences between the communication styles can be directly broached by the group members, and should the situation arise dealt with constructively. It will be pointed out to more quality exams and optimizations of the instrument.