Print Email Facebook Twitter The Oblique Effect in the Perception of the Direction Between Two Points of Vibration on the Back Title The Oblique Effect in the Perception of the Direction Between Two Points of Vibration on the Back Author Plaisier, M.A. (TU Delft Human Information Communication Design; Eindhoven University of Technology) Kappers, Astrid M.L. (Eindhoven University of Technology) Date 2022 Abstract Vibrations on the back of a person can convey information about direction through sequentially switching on two vibration motors. For perception of direction the oblique effect can occur, meaning that perception of cardinal directions is more precise than perception of oblique directions. We investigated the role of the positioning of the vibrations with respect to the spine. In the first condition all vibration motors were placed in a circle around the spine ('Circle' condition) and direction was conveyed by switching on vibration motors on opposite sides of the circle. In the second condition the vibrations were placed in two semi-circles of which the centers were on the left and right sides of the back ('Semi-circle' condition). We found that participants showed larger deviations as well as a larger spread for oblique directions than for cardinal directions in both conditions. This indicates that the oblique effect occurred. Therefore, the oblique effect can occur irregardless of the positioning of the vibration motors with respect to the spine. Both deviations and spread were larger in the 'Semi-circle' condition than in the 'Circle' condition suggesting an advantage for centering motors around the spine, although this might have been influenced by the distance between vibrations. Subject DirectionHaptic perceptionVibrotactile To reference this document use: http://resolver.tudelft.nl/uuid:c0d64cfb-dcfe-4e3b-bdad-467171e30a55 DOI https://doi.org/10.1109/TOH.2021.3136638 Embargo date 2023-07-01 ISSN 1939-1412 Source IEEE Transactions on Haptics, 15 (2), 458-463 Bibliographical note Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public. Part of collection Institutional Repository Document type journal article Rights © 2022 M.A. Plaisier, Astrid M.L. Kappers Files PDF The_Oblique_Effect_in_the ... e_Back.pdf 736.39 KB Close viewer /islandora/object/uuid:c0d64cfb-dcfe-4e3b-bdad-467171e30a55/datastream/OBJ/view