1. Sensorimotor Interaction, Max Planck Institute for Informatics, Saarland Informatics Campus, Germany
2. Human Computer Interaction Lab, Saarland University, Saarland Informatics Campus, Germany
3. Sensorimotor Interaction, Max Planck Institute for Informatics, Saarland Informatics Campus, Germany and School of Biomedical Engineering & Imaging Sciences, King's College London, United Kingdom