Speed-Accuracy Tradeoff in Trajectory-Based Tasks with Temporal Constraint

Authors:
Xiaolei Zhou;Xiang Cao;Xiangshi Ren
Affiliations:
Kochi University of Technology, Kochi, Japan 782-8502;Microsoft Research Cambridge, Cambridge, United Kingdom CB3 0FB;Kochi University of Technology, Kochi, Japan 782-8502
Venue:
INTERACT '09 Proceedings of the 12th IFIP TC 13 International Conference on Human-Computer Interaction: Part I
Year:
2009

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Abstract

Speed-accuracy tradeoff is a common phenomenon in many types of human motor tasks. In general, the more accurately the task is to be accomplished, the more time it takes, and vice versa. In particular, when users attempt to complete the task with a specified amount of time, the accuracy of the task can be considered as a dependent variable to measure user performance. In this paper we investigate speed-accuracy tradeoff in trajectory-based tasks with temporal constraint, through a controlled experiment that manipulates the movement time (MT ) in addition to the tunnel amplitude (A ) and width (W ). A quantitative model is proposed and validated to predict the task accuracy in terms of lateral standard deviation (SD ) of the trajectory.