The probes are yellow, deformable, hand-size balls which contain an embedded microchip which logs the time and the number of incidences of squeezing. These probes did not communicate with each other at this stage in the project.
Source: O’Brien, S. and Mueller, F. 2006. ‘Floyd.’ Holding hands over a distance. In Proceedings of the 18th Australia Conference on Computer-Human Interaction. ACM Press, New York, NY.
