Bark Karlin, Hyman Emily, Tan Frank, Cha Elizabeth, Jax Steven A, Buxbaum Laurel J, Kuchenbecker Katherine J
IEEE Trans Neural Syst Rehabil Eng. 2015 Jan;23(1):51-63. doi: 10.1109/TNSRE.2014.2327229. Epub 2014 Jun 2.
Tactile cues generated from lightweight, wearable actuators can help users learn new motions by providing immediate feedback on when and how to correct their movements. We present a vibrotactile motion guidance system that measures arm motions and provides vibration feedback when the user deviates from a desired trajectory. A study was conducted to test the effects of vibrotactile guidance on a subject's ability to learn arm motions. Twenty-six subjects learned motions of varying difficulty with both visual (V), and visual and vibrotactile (VVT) feedback over the course of four days of training. After four days of rest, subjects returned to perform the motions from memory with no feedback. We found that augmenting visual feedback with vibrotactile feedback helped subjects reduce the root mean square (rms) angle error of their limb significantly while they were learning the motions, particularly for 1DOF motions. Analysis of the retention data showed no significant difference in rms angle errors between feedback conditions.
由轻便的可穿戴致动器产生的触觉线索可以通过在何时以及如何纠正动作方面提供即时反馈，来帮助用户学习新动作。我们展示了一种振动触觉运动引导系统，该系统可测量手臂动作，并在用户偏离期望轨迹时提供振动反馈。进行了一项研究来测试振动触觉引导对受试者学习手臂动作能力的影响。26名受试者在四天的训练过程中，通过视觉（V）以及视觉和振动触觉（VVT）反馈学习了不同难度的动作。经过四天的休息后，受试者回来凭记忆执行动作且无反馈。我们发现，在学习动作时，用振动触觉反馈增强视觉反馈有助于受试者显著降低其肢体的均方根（rms）角度误差，特别是对于单自由度（1DOF）动作。对保留数据的分析表明，不同反馈条件下的均方根角度误差没有显著差异。
