A Comparison of Haptic Devices for Computer-based Assessment of Motor-Control Disabilities
This study is a part of a larger project focused on developing a haptic-based VR system for administration of a complex figure (Rey-Osterrieth) reproduction test in clinical assessment of motor control disabilities, particularly in veteran patients. The overall objective is to develop a customizable system with functions to support testing protocols, based on specific user requirements, and to facilitate automated scoring of tests and output of quantitative measures. This study made comparison of two haptic devices, including the Novint Falcon and SensAble Technologies PHANTOM?Desktop?device, for user figure drawing in a VR application with traditional pen and paper. Drawing performance was evaluated in repeated test trials in terms of device stylus placement and control accuracy. In addition a fuzzy model of the drawing process with each device was compared with a model for the traditional test format. Results on drawing completion time indicated that use of both haptic devices took significantly longer than the pen-paper method. There was no significant difference in completion time between the Phantom and Falcon devices. A subjective survey revealed that subjects had difficulty in controlling the Novint Falcon device. This may have been due to its low resolution for virtual pen positioning, which tended to exaggerate tiny adjustment movements resulting in zigzag shaped lines in the drawing and over-and under-shoots at intersections/corners. The graphic drawing results with the Phantom haptic device were similar to the pen-paper drawing. The survey results also confirmed that subjects felt drawing with the Phantom device was more realistic compared to the Falcon. In general, there was some evidence that the Phantom could be used as an effective alternate to the penpaper method for motor control ability tests with many benefits of automated performance processing.
Yingjie Li Prithima Mosaly David Kaber
Edward P. Fitts Department of Industrial and Systems Engineering, North Carolina State University
国际会议
17th World Congress on Ergonomics(第十七届国际人类工效学大会)
北京
英文
1-9
2009-08-09（万方平台首次上网日期，不代表论文的发表时间）