Ghost Simulator (IMAGE) Ecole Polytechnique Fédérale de Lausanne Caption (A) A master-slave robotic system was used to allow participants to move their arms forward and receive tactile feedback on the back. The feedback was administrated synchronously or asynchronously (500 ms delay) with the movement, and with our without force feedback at the participants' fingertip. (B) Participants reported higher illusory self touch, and showed a larger drift in self-location towards the virtual back in the synchronous compared to the asynchronous condition; drift was also larger in the condition with (versus without) somatosensory force feedback to the participants' fingertip (C). The condition in which five subjects spontaneously reported a FoP is indicated with an arrow. Credit Current Biology Usage Restrictions With credit License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.