Ongoing research deals with the question how to design a machine for an optimal shared control with a human being. For examinition of different methods of cooperation an experiment was carried out in which two humans solve a simplified driving task together. A pilot study was executed where both the determination of the combined output as well as the feedback from the partners were varied. The results indicate that there is neither in signal fusion nor in the way of feedback a single form of cooperation which is preferable for all participants. Instead the optimal way is dependant on the level and homogeneity of the cooperating partners.