Visual Field Muscle Synergy Effects on Control/Display Compatibility: Seeing is Believing,
NEW MEXICO STATE UNIV LAS CRUCES HUMAN FACTORS RESEARCH LAB
Pagination or Media Count:
Three components were hypothesized which could affect operator response in the manual control of a system. These Included muscle synergy compatibility MS, geographic controldisplay compatibility CD, and visual-field compatibility VF. A 2x2x2 between-subjects factorial design was used to evaluate all combinations of compatible and incompatible arrangements based upon these variables, using 64 undergraduate students as participants. A static-target acquisition task was used in which subjects manipulated a specially designed joystick to move a cursor to defined target locations. Performance measures included reaction time, movement time, homing time, and frequency and magnitude of directional reversals. Results indicated that visual field VF compatibilityincompatibility significantly Influenced reaction time, homing time, and reversal frequency and magnitude, while CD and MS manipulations had no significant main effects on performance. Significant gender effects were also found. The results of this study suggest that compatibility of control input and system response Is judged primarily by direction of movement In the virtual visual field self reference. This has implications for the design of systems such as mobile cranes where the operator may be repositioned relative to a fixed directional control.
- Anatomy and Physiology