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Scale effects in steering law tasks: Do device size and different motor joints matter?
| Content Provider | CiteSeerX |
|---|---|
| Author | Accot, Johnny Zhai, Shumin |
| Abstract | Interaction tasks on a computer screen can technically be scaled to a much larger or much smaller sized input control area by adjusting the input device’s control gain or the control-display (C-D) ratio. Human performance as a function of movement scale is a basic yet controversial topic in input control. This study introduces a new task paradigm to study the scale effect in the framework of the steering law. The results confirmed a U-shaped performance-scale function and rejected straight-line or no-effect hypotheses in the literature. We found a significant scale effect in path steering performance, although its impact was less than that of the steering law’s index of difficulty. We analyzed the scale effects in two plausible causes: movement joints shift and motor precision limitation. The theoretical implications of the scale effects to the validity of the steering law, and the practical implications of input device size and zooming functions are discussed in the paper. |
| File Format | |
| Access Restriction | Open |
| Subject Keyword | Scale Effect Different Motor Joint Matter Law Task Steering Law Path Steering Performance Law Index Controversial Topic U-shaped Performance-scale Function Input Device Movement Joint Shift Plausible Cause Motor Precision Limitation Interaction Task Sized Input Control Area Computer Screen Movement Scale Human Performance Theoretical Implication Zooming Function Practical Implication New Task Paradigm No-effect Hypothesis Control Gain Input Control Input Device Size Significant Scale Effect |
| Content Type | Text |
