CONFERENCE (INTERNATIONAL) Steering Performance with Error-accepting Delays

Shota Yamanaka

The ACM CHI Conference on Human Factors in Computing Systems (CHI 2019)

May 04, 2019

In steering law tasks, deviating from the path is immediately considered an error operation. However, in navigating a hierarchical menu item, which is a representative application of the law, a deviation of a short duration is sometimes permitted. We tested the validity of the steering law with various durations of such error-accepting delays and found that the model showed high fits for each delay condition (R^2 > 0.96) but poor fits if the delay values were not separated (R^2 = 0.58). Because the average movement speed linearly increased as the delay increased, we refined the model taking the delay into account, and the fitness was significantly improved (R^2 = 0.97) as a result. The new model helps GUI designers estimate the average operational time on the basis of the menu item length, width, and error-accepting delay.

Paper : Steering Performance with Error-accepting Delays (external link)