Performance test of cooperative work in time delay. The environment of experiment As a usability test of this method, we examined repositioning task of virtual objects. The interface of this test is shown above. We put three targets at similar distance from the start point. There is a virtual ball at the start point.
Users can only move it when both trainer and trainee grasp it.
The ball is located at the middle point between trainer's hand and trainee's hand during it is grasped. It displays current user's hand as semitransparent and delayed hand as solid. We can recognize what will be doing by predictor display. In this experiment, we use virtual balls in stead of flat surface. The reason why we don't use the same environment as previous experiment is that subjects can easily recognize whether they grasp the object or not.