Tactile expectations and the perception of self-touch: An investigation using the rubber hand paradigm |
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| Authors: | Rebekah C. White Anne M. Aimola Davies Terri J. Halleen Martin Davies |
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| Affiliation: | 1. Department of Experimental Psychology, University of Oxford, United Kingdom;2. Faculty of Philosophy, University of Oxford, United Kingdom;3. NIHR Biomedical Research Centre, University of Oxford, United Kingdom;4. Department of Psychology, The Australian National University, Australia;1. Psychology, Department of Behavioral Sciences, Ruppin Academic Center, Emek Hefer 40250, Israel;2. Sha’ar Menashe Mental Health Center, affiliated with the Technion Institute of Technology, Hadera, Israel;1. Department of Psychology, Harvard University, 33 Kirkland Street, Cambridge, MA 02138, USA;2. Department of Psychological Sciences, Vanderbilt University, 2301 Vanderbilt Place, Nashville, TN 37240, USA;1. Laboratory of Physiology, Department of Human Health Sciences, Graduate School of Medicine, Kyoto University, Kyoto, Japan;2. Kokoro Research Center, Kyoto University, Kyoto, Japan;3. Rakuwakai Otowa Hospital, Kyoto, Japan;1. Department of Psychology, University of Hertfordshire, Hatfield, Hertfordshire, UK;2. Department of Neuroscience, Karolinska Institute, Sweden |
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| Abstract: | The rubber hand paradigm is used to create the illusion of self-touch, by having the participant administer stimulation to a prosthetic hand while the Examiner, with an identical stimulus (index finger, paintbrush or stick), administers stimulation to the participant’s hand. With synchronous stimulation, participants experience the compelling illusion that they are touching their own hand. In the current study, the robustness of this illusion was assessed using incongruent stimuli. The participant used the index finger of the right hand to administer stimulation to a prosthetic hand while the Examiner used a paintbrush to administer stimulation to the participant’s left hand. The results indicate that this violation of tactile expectations does not diminish the illusion of self-touch. Participants experienced the illusion despite the use of incongruent stimuli, both when vision was precluded and when visual feedback provided clear evidence of the tactile mismatch. |
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