Redirection techniques in VR such as redirected walking allow users to experience the same passive prop repeatedly. iTurk achieves a richer experience by adding users' reconfiguration and actuation in the loop, making iTurk an application of the concept of human actuation.
Human actuation is the idea of using people to provide large-scale force feedback to users. We have shown that our human actuation systems (Haptic Turk, TurkDeck, and Mutual Turk ) provide more immersive experence using more than one user. iTurk, on the other hand, requires no additonal user but the user him/herself.