Proceedings of the XII. European Annual Conference on Human Decision Making and Manual Control: Held at the University of Kassel Kassel Germany June 22 - 24 1993: 22,-24, Juni 1993. editor(s) Johannsen, Gunnar and Borys, Bernd-Burkhard. European Annual Conference on Human Decision Making and Manual Control, (12 (Kassel)) University of Kassel, Kassel, Year 1993.