INVESTIGATING SURGICAL SIMULATOR FIDELITY AND THE EFFECTS OF SYSTEM LAG ON HUMAN PERFORMANCE
The goal of this research was to evaluate the fidelity of a virtual reality (VR)-based simulation of a surgical task by using a model of human motor-control behavior to describe performance with a haptic control device. The study was to serve as a basis for formulating general simulator design guidelines to balance perceived realism with computational load. A surgical simulator was developed for the study and user performance was tested in a virtual tissue cutting task using a virtual scalpel. The simulation included a discrete movement subtask and a tracking subtask, under different system lag conditions and settings of task difficulty. Results on the discrete movement task (moving the scalpel to a marked tissue area) revealed user performance in the VR to conform with Fitts law of motor behavior and for performance to degrade with increasing task difficulty and time lag. Tracking task results revealed an influence of parameter settings of the haptic control model on user accuracy that was mediated by the lag condition. In general, the findings of this work support predictions on human performance under various surgical simulator design conditions and formulation of design principles. They also facilitate a priori determination of whether certain VR simulation designs may be unacceptable from a task training perspective.
Yingjie Li David B. Kaber Yuan-Shin Lee
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
1-7
2009-08-09（万方平台首次上网日期，不代表论文的发表时间）