... map of the planetary system (Hanne, Hoepelmann, and F~ihnrich 1986) and a form for university registration (Wetzel, Hanne, and Hoe- pelmann 1987). 5.3 Pointing actions in TAGTILUS One aim of ... Bolt, Be- ranek and Newman. Clark, H. H., R. Schreuder and S. Buttrick (1983): Common Ground and the Understanding of Demonstrative Reference. Journal of Verbal Learning and Verbal Behavior ... guidance, - use of aids (pencil, pointer ), - complexity of movement (singular, repeated, multiple pointing), and - duration and intensity of gesture. An adequate simulation of tactile pointing...