5 EXPERIMENTWe performed an experiment to evaluate the TriggerWalking tech- nique and its biomechanical approaches described above in terms of task performance as well as spatial cognition. Therefore, we mea- sured the participants’ distance and orientation judgments for each of the di erent types of head oscillations using a triangle comple- tion task. With this method, participants have to complete a triangle by pointing to the starting point after they virtually walk along two edges of a triangle [13]. This triangulated pointing method has the advantage of allowing participants to perform spatial reasoning with the simplest nontrivial combination of translations and rota- tions as often observed in spatial cognition experiments [13, 26].