Abstract
Vibrotactile feedback (VTF) has been proposed as a non-invasive way to augment impaired or lost kinesthetic feedback in certain patient populations, thereby enhancing the real-time control of purposeful limb movements and quality of life. We used a dual tasking scenario to investigate the effects of cognitive load and short-term VTF training on VTF-guided reaching. Participants grasped the handle of a planar manipulandum with one hand and received VTF of its motion via a vibrotactile display attached to the non-moving arm. We asked participants to simultaneously perform VTF-guided reaching and a choice reaction time task both before and after training with VTF-guided reaching. Participants readily used VTF to guide goal-directed hand movements in the absence of visual feedback in the dual-task setting, even prior to training. This capability came at the cost of increased movement completion time. Short-term training on VTF-guided reaching induced significant improvements in target capture errors. Pre- and post-training comparisons of dual-task performance found training-related improvements in VTF-guided reach accuracy were resistant to dual-task interference. We found no training-related improvements in movement completion time or in the performance of the secondary task. These results indicate that VTF can be used to complete goal-directed reaches in a dual-task situation, and that a single short bout of training sufficed for participants to begin the transition between the cognitive and associative phases of learning for the integration of VTF into the planning and ongoing control of reaching movements.
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Acknowledgement
This work was supported by grants from the National Institute of Child Health & Human Development of the National Institutes of Health (under award number R15HD093086), the National Science Foundation under an Individual Research and Development plan, the Whitaker Foundation International Program, a Marie Curie Integration Grant (REMAKE, FP7-PEOPLE-2012-CIG-334201), the Fondo Giovani from MIUR, by the Italian Ministry of Foreign Affairs, Unit for Scientific and Technological Cooperation, the Erasmus+ KA 107 action (USA-Italy), and the Marquette University OPUS College of Engineering. Any opinions, findings, conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the National Science Foundation or the National Institutes of Health.
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Shah, V.A., Risi, N., Ballardini, G., Mrotek, L.A., Casadio, M., Scheidt, R.A. (2018). Effect of Dual Tasking on Vibrotactile Feedback Guided Reaching – A Pilot Study. In: Prattichizzo, D., Shinoda, H., Tan, H., Ruffaldi, E., Frisoli, A. (eds) Haptics: Science, Technology, and Applications. EuroHaptics 2018. Lecture Notes in Computer Science(), vol 10893. Springer, Cham. https://doi.org/10.1007/978-3-319-93445-7_1
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