Stepp Cara E, Matsuoka Yoky
Departments of Computer Science & Engineering and Rehabilitation Medicine, University of Washington, Seattle, WA 98195, USA.
Annu Int Conf IEEE Eng Med Biol Soc. 2010;2010:2089-92. doi: 10.1109/IEMBS.2010.5626120.
Most prosthetic hand users are limited to visual feedback of movement performance. To characterize the benefit of vibrotactile feedback for a task that lacks haptic feedback, a virtual environment was used to experimentally manipulate visual, task-relevant haptic, and remote vibrotactile feedback on simple object manipulation for unimpaired subjects. The combination of visual and remote vibrotactile feedback was compared to visual feedback alone, and to simultaneous visual and direct haptic feedback to represent ideal performance. Visual and vibrotactile feedback resulted in improvement of most performance variables including difficulty ratings relative to visual feedback alone. However addition of sensory cues to visual feedback increased trial times and the increase was steeper for vibrotactile than for haptic feedback. Specifically, during vibrotactile feedback the velocity did not change, but the duration of execution increased due to improved performance, resulting in increased trial times. This result suggests future exploration of performance improvement and execution speed for augmented sensory feedback.
大多数假肢使用者只能通过视觉反馈来了解运动表现。为了确定振动触觉反馈对缺乏触觉反馈的任务的益处，我们使用了一个虚拟环境，对未受损受试者在简单物体操作中的视觉、与任务相关的触觉和远程振动触觉反馈进行实验性操控。将视觉和远程振动触觉反馈的组合与仅视觉反馈进行比较，并与视觉和直接触觉反馈同时进行比较，以代表理想表现。与仅视觉反馈相比，视觉和振动触觉反馈使大多数性能变量得到改善，包括难度评级。然而，在视觉反馈中添加感官线索会增加试验时间，并且振动触觉反馈导致的增加幅度比触觉反馈更大。具体而言，在振动触觉反馈期间，速度没有变化，但由于性能提高，执行持续时间增加，导致试验时间增加。这一结果表明，未来需要探索增强感官反馈对性能提升和执行速度的影响。
