Multimodale Interaktion in der Virtuellen Realität
In: Mensch & Computer 2001. 1. Fachübergreifende Konferenz, Jg. 55, S. 265-2742001Order and equivalence of rational numbers: a cognitive analysis
In: Journal for research in mathematics education, Jg. 16 H. 1, S. 18-361985Order and equivalence of rational numbers: a clinical teaching experiment
In: Journal for research in mathematics education, Jg. 15 H. 5, S. 323-3411984Processing iconic gestures in a multimodal virtual construction environment
In: Gesture-Based Human-Computer Interaction and Simulation, Jg. 5085, S. 187-1922009Selected results from the rational number project
In: Proceedings of the Ninth International Conference for the Psychology of Mathematics Education, Jg. vol. 1: Individual contributions, S. 342-3511985Sharpening one's diagnostic skill by simulating students' error behaviors
In: Focus on learning problems in mathematics, Jg. 9 H. 2, S. 43-561987