Maquil, ValérieRas, Eric2017-04-152017-04-152012This chapter analyses how the physical objects and space of a tangible user interface supports groups of participants to collaboratively solve a problem. Our aim is to understand which characteristics of the physical space support the participants in thinking collaboratively. We describe a user study with a tangible tabletop for technology-based assessment. We identify a series of patterns extracted from a video analysis using the Collaborative Learning Mechanism framework. In our discussion, we elaborate the characteristics of the TUI that support interactions based on the observed patterns: the physical interaction objects, the shareability of the space, and the non-responsive spaces.entangible user interfaceinteraction designexternal cognitioncollaborative problem solvingcomputer-based assessmentuser study.Text