title: Numerical Priming Between Touch and Vision Depends on Tactile Discrimination.
abstract: Although the interaction between vision and touch is of crucial importance for perceptual and bodily self-consciousness, only little is known regarding the link between conscious access and tactile processing. Here, we tested whether the numerical encoding of tactile stimuli depends on conscious discrimination. On each trial, participants received between zero and three taps at low, medium, or high intensity and had to enumerate the number of visual items subsequently presented as a visual target. We measured tactovisual numerical priming, that is, the modulation of reaction times according to the numerical distance between the visual target and tactile prime values. While numerical priming and repetition priming were respectively elicited by high and medium intensity stimuli, no effect was found for low intensity stimuli that were not discriminable. This suggests that numerical priming between touch and vision depends on tactile discrimination. We discuss our results considering recent advances in unconscious visual numerical priming.
authors.affiliation: Laboratory of Cognitive Neuroscience, Brain Mind Institute, Ecole Polytechnique Fédérale de Lausanne, SwitzerlandCenter for Neuroprosthetics, School of Life Sciences, Ecole Polytechnique Fédérale de Lausanne, Switzerland nathan.faivre@epfl.ch.
authors.forename: Nathan
authors.initials: N
authors.lastname: Faivre
authors.affiliation: Laboratory of Cognitive Neuroscience, Brain Mind Institute, Ecole Polytechnique Fédérale de Lausanne, SwitzerlandCenter for Neuroprosthetics, School of Life Sciences, Ecole Polytechnique Fédérale de Lausanne, Switzerland.
authors.forename: Roy
authors.initials: R
authors.lastname: Salomon
authors.affiliation: Laboratory of Cognitive Neuroscience, Brain Mind Institute, Ecole Polytechnique Fédérale de Lausanne, SwitzerlandCenter for Neuroprosthetics, School of Life Sciences, Ecole Polytechnique Fédérale de Lausanne, Switzerland.
authors.forename: Laurène
authors.initials: L
authors.lastname: Vuillaume
authors.affiliation: Laboratory of Cognitive Neuroscience, Brain Mind Institute, Ecole Polytechnique Fédérale de Lausanne, SwitzerlandCenter for Neuroprosthetics, School of Life Sciences, Ecole Polytechnique Fédérale de Lausanne, SwitzerlandDepartment of Neurology, University Hospital, Geneva, Switzerland.
authors.forename: Olaf
authors.initials: O
authors.lastname: Blanke
mesh_terms: D004192:Discrimination, Psychological / Q000502:physiology*; D006801:Humans; D055641:Mathematical Concepts; D011597:Psychomotor Performance / Q000502:physiology*; D060865:Repetition Priming / Q000502:physiology*; D055698:Touch Perception / Q000502:physiology*; D014796:Visual Perception / Q000502:physiology*
keywords: Visual perception; numerosity; priming; tactile perception